diff --git a/doc/src/Build_development.rst b/doc/src/Build_development.rst
index 3c2acbaa7e..5492a1e536 100644
--- a/doc/src/Build_development.rst
+++ b/doc/src/Build_development.rst
@@ -185,6 +185,10 @@ The ``ctest`` command has many options, the most important ones are:
      - run subset of tests matching the regular expression <regex>
    * - -E <regex>
      - exclude subset of tests matching the regular expression <regex>
+   * - -L <regex>
+     - run subset of tests with a label matching the regular expression <regex>
+   * - -LE <regex>
+     - exclude subset of tests with a label matching the regular expression <regex>
    * - -N
      - dry-run: display list of tests without running them
    * - -T memcheck
@@ -299,6 +303,12 @@ will destroy the original file, if the generation run does not complete,
 so using *-g* is recommended unless the YAML file is fully tested
 and working.
 
+Some of the force style tests are rather slow to run and some are very
+sensitive to small differences like CPU architecture, compiler
+toolchain, compiler optimization. Those tests are flagged with a "slow"
+and/or "unstable" label, and thus those tests can be selectively
+excluded with the ``-LE`` flag or selected with the ``-L`` flag.
+
 .. admonition:: Recommendations and notes for YAML files
    :class: note
 
diff --git a/unittest/force-styles/CMakeLists.txt b/unittest/force-styles/CMakeLists.txt
index 39730e6aeb..464cd9426a 100644
--- a/unittest/force-styles/CMakeLists.txt
+++ b/unittest/force-styles/CMakeLists.txt
@@ -12,6 +12,13 @@ if(NOT YAML_FOUND)
   add_library(Yaml::Yaml ALIAS yaml)
 endif()
 
+function(extract_tags out yaml_file)
+  file(STRINGS ${yaml_file} TAGS_LINE REGEX "^tags:")
+  string(REPLACE "tags:" "" TAGS_LINE "${TAGS_LINE}")
+  string(REGEX MATCHALL "[^, \t\r\n]+" TAGS "${TAGS_LINE}")
+  set(${out} "${TAGS}" PARENT_SCOPE)
+endfunction()
+
 if(CMAKE_VERSION VERSION_LESS 3.12)
   # adjust so we find Python 3 versions before Python 2 on old systems with old CMake
   set(Python_ADDITIONAL_VERSIONS 3.8 3.7 3.6 3.5)
@@ -73,24 +80,30 @@ if(FFT_SINGLE)
 endif()
 foreach(TEST ${MOL_PAIR_TESTS})
   string(REGEX REPLACE "^.*mol-pair-(.*)\.yaml" "MolPairStyle:\\1" TNAME ${TEST})
+  extract_tags(TEST_TAGS ${TEST})
   add_test(NAME ${TNAME} COMMAND test_pair_style ${TEST} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
   set_tests_properties(${TNAME} PROPERTIES ENVIRONMENT "LAMMPS_POTENTIALS=${LAMMPS_POTENTIALS_DIR};PYTHONPATH=${TEST_INPUT_FOLDER}:$ENV{PYTHONPATH}")
+  set_tests_properties(${TNAME} PROPERTIES LABELS "${TEST_TAGS}")
 endforeach()
 
 # tests for metal-like atomic systems and related pair styles
 file(GLOB ATOMIC_PAIR_TESTS LIST_DIRECTORIES false ${TEST_INPUT_FOLDER}/atomic-pair-*.yaml)
 foreach(TEST ${ATOMIC_PAIR_TESTS})
   string(REGEX REPLACE "^.*atomic-pair-(.*)\.yaml" "AtomicPairStyle:\\1" TNAME ${TEST})
+  extract_tags(TEST_TAGS ${TEST})
   add_test(NAME ${TNAME} COMMAND test_pair_style ${TEST} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
   set_tests_properties(${TNAME} PROPERTIES ENVIRONMENT "LAMMPS_POTENTIALS=${LAMMPS_POTENTIALS_DIR};PYTHONPATH=${TEST_INPUT_FOLDER}:$ENV{PYTHONPATH}")
+  set_tests_properties(${TNAME} PROPERTIES LABELS "${TEST_TAGS}")
 endforeach()
 
 # tests for Si-like manybody systems and related pair styles
 file(GLOB MANYBODY_PAIR_TESTS LIST_DIRECTORIES false ${TEST_INPUT_FOLDER}/manybody-pair-*.yaml)
 foreach(TEST ${MANYBODY_PAIR_TESTS})
   string(REGEX REPLACE "^.*manybody-pair-(.*)\.yaml" "ManybodyPairStyle:\\1" TNAME ${TEST})
+  extract_tags(TEST_TAGS ${TEST})
   add_test(NAME ${TNAME} COMMAND test_pair_style ${TEST} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
   set_tests_properties(${TNAME} PROPERTIES ENVIRONMENT "LAMMPS_POTENTIALS=${LAMMPS_POTENTIALS_DIR};PYTHONPATH=${TEST_INPUT_FOLDER}:$ENV{PYTHONPATH}")
+  set_tests_properties(${TNAME} PROPERTIES LABELS "${TEST_TAGS}")
 endforeach()
 
 # bond style tester
@@ -100,8 +113,10 @@ target_link_libraries(test_bond_style PRIVATE lammps style_tests)
 file(GLOB BOND_TESTS LIST_DIRECTORIES false ${TEST_INPUT_FOLDER}/bond-*.yaml)
 foreach(TEST ${BOND_TESTS})
   string(REGEX REPLACE "^.*bond-(.*)\.yaml" "BondStyle:\\1" TNAME ${TEST})
+  extract_tags(TEST_TAGS ${TEST})
   add_test(NAME ${TNAME} COMMAND test_bond_style ${TEST} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
   set_tests_properties(${TNAME} PROPERTIES ENVIRONMENT "LAMMPS_POTENTIALS=${LAMMPS_POTENTIALS_DIR};PYTHONPATH=${TEST_INPUT_FOLDER}:$ENV{PYTHONPATH}")
+  set_tests_properties(${TNAME} PROPERTIES LABELS "${TEST_TAGS}")
 endforeach()
 
 # angle style tester
@@ -111,8 +126,10 @@ target_link_libraries(test_angle_style PRIVATE lammps style_tests)
 file(GLOB ANGLE_TESTS LIST_DIRECTORIES false ${TEST_INPUT_FOLDER}/angle-*.yaml)
 foreach(TEST ${ANGLE_TESTS})
   string(REGEX REPLACE "^.*angle-(.*)\.yaml" "AngleStyle:\\1" TNAME ${TEST})
+  extract_tags(TEST_TAGS ${TEST})
   add_test(NAME ${TNAME} COMMAND test_angle_style ${TEST} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
   set_tests_properties(${TNAME} PROPERTIES ENVIRONMENT "LAMMPS_POTENTIALS=${LAMMPS_POTENTIALS_DIR};PYTHONPATH=${TEST_INPUT_FOLDER}:$ENV{PYTHONPATH}")
+  set_tests_properties(${TNAME} PROPERTIES LABELS "${TEST_TAGS}")
 endforeach()
 
 # kspace style tester, currently uses the pair style tool
@@ -123,8 +140,10 @@ if(FFT_SINGLE)
 endif()
 foreach(TEST ${KSPACE_TESTS})
   string(REGEX REPLACE "^.*kspace-(.*)\.yaml" "KSpaceStyle:\\1" TNAME ${TEST})
+  extract_tags(TEST_TAGS ${TEST})
   add_test(NAME ${TNAME} COMMAND test_pair_style ${TEST} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
   set_tests_properties(${TNAME} PROPERTIES ENVIRONMENT "LAMMPS_POTENTIALS=${LAMMPS_POTENTIALS_DIR};PYTHONPATH=${TEST_INPUT_FOLDER}:$ENV{PYTHONPATH}")
+  set_tests_properties(${TNAME} PROPERTIES LABELS "${TEST_TAGS}")
 endforeach()
 
 # tester for timestepping fixes
@@ -138,8 +157,10 @@ target_link_libraries(test_fix_timestep PRIVATE lammps style_tests)
 file(GLOB FIX_TIMESTEP_TESTS LIST_DIRECTORIES false ${TEST_INPUT_FOLDER}/fix-timestep-*.yaml)
 foreach(TEST ${FIX_TIMESTEP_TESTS})
   string(REGEX REPLACE "^.*fix-timestep-(.*)\.yaml" "FixTimestep:\\1" TNAME ${TEST})
+  extract_tags(TEST_TAGS ${TEST})
   add_test(NAME ${TNAME} COMMAND test_fix_timestep ${TEST} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
   set_tests_properties(${TNAME} PROPERTIES ENVIRONMENT "LAMMPS_POTENTIALS=${LAMMPS_POTENTIALS_DIR};PYTHONPATH=${TEST_INPUT_FOLDER}:${LAMMPS_PYTHON_DIR}:$ENV{PYTHONPATH}")
+  set_tests_properties(${TNAME} PROPERTIES LABELS "${TEST_TAGS}")
 endforeach()
 
 # dihedral style tester
@@ -149,8 +170,10 @@ target_link_libraries(test_dihedral_style PRIVATE lammps style_tests)
 file(GLOB DIHEDRAL_TESTS LIST_DIRECTORIES false ${TEST_INPUT_FOLDER}/dihedral-*.yaml)
 foreach(TEST ${DIHEDRAL_TESTS})
   string(REGEX REPLACE "^.*dihedral-(.*)\.yaml" "DihedralStyle:\\1" TNAME ${TEST})
+  extract_tags(TEST_TAGS ${TEST})
   add_test(NAME ${TNAME} COMMAND test_dihedral_style ${TEST} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
   set_tests_properties(${TNAME} PROPERTIES ENVIRONMENT "LAMMPS_POTENTIALS=${LAMMPS_POTENTIALS_DIR};PYTHONPATH=${TEST_INPUT_FOLDER}:$ENV{PYTHONPATH}")
+  set_tests_properties(${TNAME} PROPERTIES LABELS "${TEST_TAGS}")
 endforeach()
 
 # improper style tester
@@ -160,6 +183,8 @@ target_link_libraries(test_improper_style PRIVATE lammps style_tests)
 file(GLOB IMPROPER_TESTS LIST_DIRECTORIES false ${TEST_INPUT_FOLDER}/improper-*.yaml)
 foreach(TEST ${IMPROPER_TESTS})
   string(REGEX REPLACE "^.*improper-(.*)\.yaml" "ImproperStyle:\\1" TNAME ${TEST})
+  extract_tags(TEST_TAGS ${TEST})
   add_test(NAME ${TNAME} COMMAND test_improper_style ${TEST} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
   set_tests_properties(${TNAME} PROPERTIES ENVIRONMENT "LAMMPS_POTENTIALS=${LAMMPS_POTENTIALS_DIR};PYTHONPATH=${TEST_INPUT_FOLDER}:$ENV{PYTHONPATH}")
+  set_tests_properties(${TNAME} PROPERTIES LABELS "${TEST_TAGS}")
 endforeach()
diff --git a/unittest/force-styles/test_config.h b/unittest/force-styles/test_config.h
index bf4f867f3b..ef4d911b60 100644
--- a/unittest/force-styles/test_config.h
+++ b/unittest/force-styles/test_config.h
@@ -16,6 +16,7 @@
 
 #include <set>
 #include <string>
+#include <sstream>
 #include <utility>
 #include <vector>
 
@@ -37,6 +38,7 @@ public:
     std::vector<std::pair<std::string, std::string>> prerequisites;
     std::vector<std::string> pre_commands;
     std::vector<std::string> post_commands;
+    std::vector<std::string> tags;
     std::string input_file;
     std::string pair_style;
     std::string bond_style;
@@ -96,6 +98,19 @@ public:
     }
     virtual ~TestConfig(){};
 
+    std::string tags_line() const
+    {
+      if(tags.size() > 0) {
+          std::stringstream line;
+          line << tags[0];
+          for(size_t i = 1; i < tags.size(); i++) {
+            line << ", " << tags[i];
+          }
+          return line.str();
+      }
+      return "generated";
+    }
+
 private:
     TestConfig(const TestConfig &){};
 };
diff --git a/unittest/force-styles/test_config_reader.cpp b/unittest/force-styles/test_config_reader.cpp
index 65e9e4b0f6..e6cf73f10e 100644
--- a/unittest/force-styles/test_config_reader.cpp
+++ b/unittest/force-styles/test_config_reader.cpp
@@ -27,10 +27,12 @@
 #include <vector>
 
 using LAMMPS_NS::utils::split_words;
+using LAMMPS_NS::utils::trim;
 
 TestConfigReader::TestConfigReader(TestConfig &config) : YamlReader(), config(config)
 {
     consumers["lammps_version"] = &TestConfigReader::lammps_version;
+    consumers["tags"]           = &TestConfigReader::tags;
     consumers["date_generated"] = &TestConfigReader::date_generated;
     consumers["epsilon"]        = &TestConfigReader::epsilon;
     consumers["skip_tests"]     = &TestConfigReader::skip_tests;
@@ -367,3 +369,12 @@ void TestConfigReader::global_vector(const yaml_event_t &event)
         config.global_vector.push_back(value);
     }
 }
+
+void TestConfigReader::tags(const yaml_event_t &event)
+{
+    std::stringstream data((char *)event.data.scalar.value);
+    config.tags.clear();
+    for (std::string tag; std::getline(data, tag, ','); ) {
+        config.tags.push_back(trim(tag));
+    }
+}
diff --git a/unittest/force-styles/test_config_reader.h b/unittest/force-styles/test_config_reader.h
index bf69f149fe..1f0de8df0a 100644
--- a/unittest/force-styles/test_config_reader.h
+++ b/unittest/force-styles/test_config_reader.h
@@ -58,6 +58,7 @@ public:
     void run_energy(const yaml_event_t &event);
     void global_scalar(const yaml_event_t &event);
     void global_vector(const yaml_event_t &event);
+    void tags(const yaml_event_t &event);
 };
 
 #endif
diff --git a/unittest/force-styles/test_main.cpp b/unittest/force-styles/test_main.cpp
index 1ad0b79455..2680804fdf 100644
--- a/unittest/force-styles/test_main.cpp
+++ b/unittest/force-styles/test_main.cpp
@@ -46,6 +46,9 @@ void write_yaml_header(YamlWriter *writer, TestConfig *cfg, const char *version)
     // lammps_version
     writer->emit("lammps_version", version);
 
+    // tags
+    writer->emit("tags", cfg->tags_line());
+
     // date_generated
     std::time_t now   = time(nullptr);
     std::string block = trim(ctime(&now));
diff --git a/unittest/force-styles/tests/angle-charmm.yaml b/unittest/force-styles/tests/angle-charmm.yaml
index 83c9609995..973e89169b 100644
--- a/unittest/force-styles/tests/angle-charmm.yaml
+++ b/unittest/force-styles/tests/angle-charmm.yaml
@@ -1,7 +1,7 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:09:23 2021
-epsilon: 5e-13
+epsilon: 1e-12
 prerequisites: ! |
   atom full
   angle charmm
diff --git a/unittest/force-styles/tests/angle-class2.yaml b/unittest/force-styles/tests/angle-class2.yaml
index ffd48d7727..c8896efba1 100644
--- a/unittest/force-styles/tests/angle-class2.yaml
+++ b/unittest/force-styles/tests/angle-class2.yaml
@@ -1,7 +1,7 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:09:23 2021
-epsilon: 2.5e-13
+epsilon: 1e-12
 prerequisites: ! |
   atom full
   angle class2
diff --git a/unittest/force-styles/tests/angle-class2_p6.yaml b/unittest/force-styles/tests/angle-class2_p6.yaml
index 72ee6626c8..68676960f7 100644
--- a/unittest/force-styles/tests/angle-class2_p6.yaml
+++ b/unittest/force-styles/tests/angle-class2_p6.yaml
@@ -1,7 +1,7 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:09:23 2021
-epsilon: 2.5e-13
+epsilon: 5e-13
 prerequisites: ! |
   atom full
   angle class2/p6
diff --git a/unittest/force-styles/tests/angle-cosine_delta.yaml b/unittest/force-styles/tests/angle-cosine_delta.yaml
index e59eda767f..1141e4ceff 100644
--- a/unittest/force-styles/tests/angle-cosine_delta.yaml
+++ b/unittest/force-styles/tests/angle-cosine_delta.yaml
@@ -1,7 +1,7 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:09:23 2021
-epsilon: 2.5e-13
+epsilon: 5e-13
 prerequisites: ! |
   atom full
   angle cosine/delta
diff --git a/unittest/force-styles/tests/angle-cosine_shift.yaml b/unittest/force-styles/tests/angle-cosine_shift.yaml
index 0518db6d83..507f75e70e 100644
--- a/unittest/force-styles/tests/angle-cosine_shift.yaml
+++ b/unittest/force-styles/tests/angle-cosine_shift.yaml
@@ -1,7 +1,7 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:09:23 2021
-epsilon: 2.5e-13
+epsilon: 1e-12
 prerequisites: ! |
   atom full
   angle cosine/shift
diff --git a/unittest/force-styles/tests/angle-harmonic.yaml b/unittest/force-styles/tests/angle-harmonic.yaml
index 7490bf6764..6e884a40e0 100644
--- a/unittest/force-styles/tests/angle-harmonic.yaml
+++ b/unittest/force-styles/tests/angle-harmonic.yaml
@@ -1,7 +1,7 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:09:24 2021
-epsilon: 5e-13
+epsilon: 7.5e-13
 prerequisites: ! |
   atom full
   angle harmonic
diff --git a/unittest/force-styles/tests/angle-quartic.yaml b/unittest/force-styles/tests/angle-quartic.yaml
index 3fd927ac4a..b28882840d 100644
--- a/unittest/force-styles/tests/angle-quartic.yaml
+++ b/unittest/force-styles/tests/angle-quartic.yaml
@@ -1,7 +1,7 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:09:25 2021
-epsilon: 4e-13
+epsilon: 7.5e-13
 prerequisites: ! |
   atom full
   angle quartic
diff --git a/unittest/force-styles/tests/atomic-pair-adp.yaml b/unittest/force-styles/tests/atomic-pair-adp.yaml
index 8d8a707bff..852fa103b6 100644
--- a/unittest/force-styles/tests/atomic-pair-adp.yaml
+++ b/unittest/force-styles/tests/atomic-pair-adp.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:08:58 2021
 epsilon: 5e-13
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/atomic-pair-atm.yaml b/unittest/force-styles/tests/atomic-pair-atm.yaml
index 0fc90345a3..76189db0aa 100644
--- a/unittest/force-styles/tests/atomic-pair-atm.yaml
+++ b/unittest/force-styles/tests/atomic-pair-atm.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:08:58 2021
 epsilon: 5e-12
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/atomic-pair-buck_coul_cut_qeq_point.yaml b/unittest/force-styles/tests/atomic-pair-buck_coul_cut_qeq_point.yaml
index 31a44ce897..d79bfd9955 100644
--- a/unittest/force-styles/tests/atomic-pair-buck_coul_cut_qeq_point.yaml
+++ b/unittest/force-styles/tests/atomic-pair-buck_coul_cut_qeq_point.yaml
@@ -2,6 +2,7 @@
 lammps_version: 8 Apr 2021
 date_generated: Tue Apr 20 14:47:51 2021
 epsilon: 7.5e-13
+tags: unstable
 skip_tests: intel single gpu
 prerequisites: ! |
   pair buck/coul/cut
diff --git a/unittest/force-styles/tests/atomic-pair-buck_coul_cut_qeq_shielded.yaml b/unittest/force-styles/tests/atomic-pair-buck_coul_cut_qeq_shielded.yaml
index ca05006535..9b8773c67e 100644
--- a/unittest/force-styles/tests/atomic-pair-buck_coul_cut_qeq_shielded.yaml
+++ b/unittest/force-styles/tests/atomic-pair-buck_coul_cut_qeq_shielded.yaml
@@ -2,6 +2,7 @@
 lammps_version: 8 Apr 2021
 date_generated: Tue Apr 20 14:48:00 2021
 epsilon: 7.5e-13
+tags: unstable
 skip_tests: intel single gpu
 prerequisites: ! |
   pair buck/coul/cut
diff --git a/unittest/force-styles/tests/atomic-pair-eam_fs.yaml b/unittest/force-styles/tests/atomic-pair-eam_fs.yaml
index 58c533d7ec..88b2512214 100644
--- a/unittest/force-styles/tests/atomic-pair-eam_fs.yaml
+++ b/unittest/force-styles/tests/atomic-pair-eam_fs.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:01 2021
 epsilon: 5e-12
 skip_tests: single
diff --git a/unittest/force-styles/tests/atomic-pair-eam_fs_real.yaml b/unittest/force-styles/tests/atomic-pair-eam_fs_real.yaml
index f7739ee824..290a567708 100644
--- a/unittest/force-styles/tests/atomic-pair-eam_fs_real.yaml
+++ b/unittest/force-styles/tests/atomic-pair-eam_fs_real.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:01 2021
 epsilon: 7.5e-12
 skip_tests: single
diff --git a/unittest/force-styles/tests/atomic-pair-edip.yaml b/unittest/force-styles/tests/atomic-pair-edip.yaml
index 91b7fd8db4..9d01cbaf18 100644
--- a/unittest/force-styles/tests/atomic-pair-edip.yaml
+++ b/unittest/force-styles/tests/atomic-pair-edip.yaml
@@ -1,7 +1,8 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow, unstable
 date_generated: Fri Feb 26 23:09:02 2021
-epsilon: 7.5e-13
+epsilon: 7e-9
 prerequisites: ! |
   pair edip
 pre_commands: ! |
diff --git a/unittest/force-styles/tests/atomic-pair-hybrid-eam.yaml b/unittest/force-styles/tests/atomic-pair-hybrid-eam.yaml
index 737b054dd0..86b03d3a34 100644
--- a/unittest/force-styles/tests/atomic-pair-hybrid-eam.yaml
+++ b/unittest/force-styles/tests/atomic-pair-hybrid-eam.yaml
@@ -1,7 +1,8 @@
 ---
 lammps_version: 8 Apr 2021
 date_generated: Mon Apr 19 08:49:08 2021
-epsilon: 1e-11
+epsilon: 2e-10
+tags: unstable
 skip_tests: single
 prerequisites: ! |
   pair eam/fs
diff --git a/unittest/force-styles/tests/atomic-pair-hybrid-eam_fs.yaml b/unittest/force-styles/tests/atomic-pair-hybrid-eam_fs.yaml
index d45dc9190e..8b9cd93505 100644
--- a/unittest/force-styles/tests/atomic-pair-hybrid-eam_fs.yaml
+++ b/unittest/force-styles/tests/atomic-pair-hybrid-eam_fs.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 8 Apr 2021
+tags: slow
 date_generated: Mon Apr 19 08:49:08 2021
 epsilon: 5e-12
 skip_tests: single
diff --git a/unittest/force-styles/tests/atomic-pair-meam.yaml b/unittest/force-styles/tests/atomic-pair-meam.yaml
index 08193987f8..70bb16a330 100644
--- a/unittest/force-styles/tests/atomic-pair-meam.yaml
+++ b/unittest/force-styles/tests/atomic-pair-meam.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:03 2021
 epsilon: 2.5e-12
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/atomic-pair-meam_spline.yaml b/unittest/force-styles/tests/atomic-pair-meam_spline.yaml
index 9ee9ee13fb..0de2fba11c 100644
--- a/unittest/force-styles/tests/atomic-pair-meam_spline.yaml
+++ b/unittest/force-styles/tests/atomic-pair-meam_spline.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:03 2021
 epsilon: 5e-14
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/atomic-pair-meam_sw_spline.yaml b/unittest/force-styles/tests/atomic-pair-meam_sw_spline.yaml
index b9f330e6de..13f1761f8f 100644
--- a/unittest/force-styles/tests/atomic-pair-meam_sw_spline.yaml
+++ b/unittest/force-styles/tests/atomic-pair-meam_sw_spline.yaml
@@ -1,7 +1,8 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow, unstable
 date_generated: Fri Feb 26 23:09:03 2021
-epsilon: 1e-14
+epsilon: 5e-13
 prerequisites: ! |
   pair meam/sw/spline
 pre_commands: ! |
diff --git a/unittest/force-styles/tests/atomic-pair-reaxff-acks2.yaml b/unittest/force-styles/tests/atomic-pair-reaxff-acks2.yaml
index 2444e76746..0026e9d715 100644
--- a/unittest/force-styles/tests/atomic-pair-reaxff-acks2.yaml
+++ b/unittest/force-styles/tests/atomic-pair-reaxff-acks2.yaml
@@ -1,7 +1,8 @@
 ---
 lammps_version: 31 Aug 2021
+tags: slow, unstable
 date_generated: Tue Sep 21 15:02:20 2021
-epsilon: 5e-9
+epsilon: 7.5e-9
 skip_tests: omp
 prerequisites: ! |
   pair reaxff
diff --git a/unittest/force-styles/tests/atomic-pair-reaxff-acks2_efield.yaml b/unittest/force-styles/tests/atomic-pair-reaxff-acks2_efield.yaml
index 295b343dea..e6f9599494 100644
--- a/unittest/force-styles/tests/atomic-pair-reaxff-acks2_efield.yaml
+++ b/unittest/force-styles/tests/atomic-pair-reaxff-acks2_efield.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 29 Sep 2021
+tags: slow, unstable
 date_generated: Wed Oct 13 18:05:37 2021
 epsilon: 5e-09
 skip_tests: omp
diff --git a/unittest/force-styles/tests/atomic-pair-reaxff.yaml b/unittest/force-styles/tests/atomic-pair-reaxff.yaml
index ccb88d6ca4..1d540363bb 100644
--- a/unittest/force-styles/tests/atomic-pair-reaxff.yaml
+++ b/unittest/force-styles/tests/atomic-pair-reaxff.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 30 Jul 2021
+tags: slow, unstable
 date_generated: Mon Aug 23 20:32:03 2021
 epsilon: 2e-10
 skip_tests:
diff --git a/unittest/force-styles/tests/atomic-pair-reaxff_lgvdw.yaml b/unittest/force-styles/tests/atomic-pair-reaxff_lgvdw.yaml
index b4afe5942a..363f7cf74d 100644
--- a/unittest/force-styles/tests/atomic-pair-reaxff_lgvdw.yaml
+++ b/unittest/force-styles/tests/atomic-pair-reaxff_lgvdw.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 30 Jul 2021
+tags: slow, unstable
 date_generated: Mon Aug 23 20:32:03 2021
 epsilon: 4e-12
 skip_tests:
diff --git a/unittest/force-styles/tests/atomic-pair-reaxff_noqeq.yaml b/unittest/force-styles/tests/atomic-pair-reaxff_noqeq.yaml
index 4fb058a2af..f02caf13cc 100644
--- a/unittest/force-styles/tests/atomic-pair-reaxff_noqeq.yaml
+++ b/unittest/force-styles/tests/atomic-pair-reaxff_noqeq.yaml
@@ -1,7 +1,9 @@
 ---
 lammps_version: 30 Jul 2021
+tags: slow, unstable
 date_generated: Mon Aug 23 20:32:04 2021
-epsilon: 5e-13
+epsilon: 2e-11
+tags: unstable
 skip_tests:
 prerequisites: ! |
   pair reaxff
diff --git a/unittest/force-styles/tests/atomic-pair-reaxff_tabulate.yaml b/unittest/force-styles/tests/atomic-pair-reaxff_tabulate.yaml
index dd8f5d8103..5acd407191 100644
--- a/unittest/force-styles/tests/atomic-pair-reaxff_tabulate.yaml
+++ b/unittest/force-styles/tests/atomic-pair-reaxff_tabulate.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 30 Jul 2021
+tags: slow, unstable
 date_generated: Mon Aug 23 20:32:05 2021
 epsilon: 1e-12
 skip_tests:
diff --git a/unittest/force-styles/tests/bond-gaussian.yaml b/unittest/force-styles/tests/bond-gaussian.yaml
index b5553fb053..944ff630c6 100644
--- a/unittest/force-styles/tests/bond-gaussian.yaml
+++ b/unittest/force-styles/tests/bond-gaussian.yaml
@@ -1,7 +1,7 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:09:21 2021
-epsilon: 2.5e-13
+epsilon: 1e-12
 prerequisites: ! |
   atom full
   bond gaussian
diff --git a/unittest/force-styles/tests/dihedral-quadratic.yaml b/unittest/force-styles/tests/dihedral-quadratic.yaml
index b1c59e131f..e335e7d822 100644
--- a/unittest/force-styles/tests/dihedral-quadratic.yaml
+++ b/unittest/force-styles/tests/dihedral-quadratic.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: unstable
 date_generated: Fri Feb 26 23:09:35 2021
 epsilon: 1e-12
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/dihedral-table_cut_linear.yaml b/unittest/force-styles/tests/dihedral-table_cut_linear.yaml
index fdfa9bfcb5..00894aecdb 100644
--- a/unittest/force-styles/tests/dihedral-table_cut_linear.yaml
+++ b/unittest/force-styles/tests/dihedral-table_cut_linear.yaml
@@ -1,7 +1,8 @@
 ---
 lammps_version: 10 Mar 2021
+tags: unstable
 date_generated: Tue Mar 23 08:05:02 202
-epsilon: 5e-14
+epsilon: 1e-13
 prerequisites: ! |
   atom full
   dihedral table/cut
diff --git a/unittest/force-styles/tests/dihedral-table_linear.yaml b/unittest/force-styles/tests/dihedral-table_linear.yaml
index 608208e275..d114e86b81 100644
--- a/unittest/force-styles/tests/dihedral-table_linear.yaml
+++ b/unittest/force-styles/tests/dihedral-table_linear.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Mar 2021
+tags: unstable
 date_generated: Mon Mar 22 21:19:05 202
 epsilon: 7.5e-14
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/fix-timestep-drag.yaml b/unittest/force-styles/tests/fix-timestep-drag.yaml
index fbcee25721..b7e61ab3ad 100644
--- a/unittest/force-styles/tests/fix-timestep-drag.yaml
+++ b/unittest/force-styles/tests/fix-timestep-drag.yaml
@@ -1,7 +1,7 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:09:53 2021
-epsilon: 5e-14
+epsilon: 2e-13
 prerequisites: ! |
   atom full
   fix drag
diff --git a/unittest/force-styles/tests/fix-timestep-momentum.yaml b/unittest/force-styles/tests/fix-timestep-momentum.yaml
index 4ae3b928bf..de60504db5 100644
--- a/unittest/force-styles/tests/fix-timestep-momentum.yaml
+++ b/unittest/force-styles/tests/fix-timestep-momentum.yaml
@@ -1,7 +1,7 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:09:54 2021
-epsilon: 5e-14
+epsilon: 2e-13
 prerequisites: ! |
   atom full
   fix momentum
diff --git a/unittest/force-styles/tests/fix-timestep-npt_sphere_tri.yaml b/unittest/force-styles/tests/fix-timestep-npt_sphere_tri.yaml
index a30917cbc6..204f09bdbf 100644
--- a/unittest/force-styles/tests/fix-timestep-npt_sphere_tri.yaml
+++ b/unittest/force-styles/tests/fix-timestep-npt_sphere_tri.yaml
@@ -1,7 +1,7 @@
 ---
 lammps_version: 30 Jul 2021
 date_generated: Sun Aug 22 14:15:09 2021
-epsilon: 5e-13
+epsilon: 1e-12
 skip_tests:
 prerequisites: ! |
   atom full
diff --git a/unittest/force-styles/tests/fix-timestep-nvt.yaml b/unittest/force-styles/tests/fix-timestep-nvt.yaml
index 298b506ab2..500bb47c76 100644
--- a/unittest/force-styles/tests/fix-timestep-nvt.yaml
+++ b/unittest/force-styles/tests/fix-timestep-nvt.yaml
@@ -1,7 +1,7 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:09:55 2021
-epsilon: 2e-13
+epsilon: 5e-13
 prerequisites: ! |
   atom full
   fix nvt
diff --git a/unittest/force-styles/tests/fix-timestep-rattle_angle.yaml b/unittest/force-styles/tests/fix-timestep-rattle_angle.yaml
index 92ac0b5cab..9c432c8db8 100644
--- a/unittest/force-styles/tests/fix-timestep-rattle_angle.yaml
+++ b/unittest/force-styles/tests/fix-timestep-rattle_angle.yaml
@@ -1,7 +1,8 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:09:55 2021
-epsilon: 3e-10
+epsilon: 9e-10
+tags: unstable
 prerequisites: ! |
   atom full
   fix rattle
diff --git a/unittest/force-styles/tests/fix-timestep-rigid_single.yaml b/unittest/force-styles/tests/fix-timestep-rigid_single.yaml
index 61957af75d..4622e159d2 100644
--- a/unittest/force-styles/tests/fix-timestep-rigid_single.yaml
+++ b/unittest/force-styles/tests/fix-timestep-rigid_single.yaml
@@ -1,7 +1,7 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:09:57 2021
-epsilon: 5e-13
+epsilon: 7.5e-13
 prerequisites: ! |
   atom full
   fix rigid
diff --git a/unittest/force-styles/tests/fix-timestep-shake_angle.yaml b/unittest/force-styles/tests/fix-timestep-shake_angle.yaml
index 3317f7a187..0b6c1f7093 100644
--- a/unittest/force-styles/tests/fix-timestep-shake_angle.yaml
+++ b/unittest/force-styles/tests/fix-timestep-shake_angle.yaml
@@ -1,7 +1,8 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:09:58 2021
-epsilon: 3e-10
+tags: unstable
+epsilon: 9e-10
 prerequisites: ! |
   atom full
   fix shake
diff --git a/unittest/force-styles/tests/fix-timestep-temp_berendsen.yaml b/unittest/force-styles/tests/fix-timestep-temp_berendsen.yaml
index 8b2d946782..631f7c2cae 100644
--- a/unittest/force-styles/tests/fix-timestep-temp_berendsen.yaml
+++ b/unittest/force-styles/tests/fix-timestep-temp_berendsen.yaml
@@ -1,7 +1,7 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:09:59 2021
-epsilon: 2e-14
+epsilon: 5e-14
 prerequisites: ! |
   atom full
   fix temp/berendsen
diff --git a/unittest/force-styles/tests/fix-timestep-temp_csld.yaml b/unittest/force-styles/tests/fix-timestep-temp_csld.yaml
index a25a54e733..8266fe11c1 100644
--- a/unittest/force-styles/tests/fix-timestep-temp_csld.yaml
+++ b/unittest/force-styles/tests/fix-timestep-temp_csld.yaml
@@ -1,7 +1,7 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:09:59 2021
-epsilon: 2e-14
+epsilon: 5e-14
 prerequisites: ! |
   atom full
   fix temp/csld
diff --git a/unittest/force-styles/tests/fix-timestep-temp_csvr.yaml b/unittest/force-styles/tests/fix-timestep-temp_csvr.yaml
index c66a1f2f59..91de6e649c 100644
--- a/unittest/force-styles/tests/fix-timestep-temp_csvr.yaml
+++ b/unittest/force-styles/tests/fix-timestep-temp_csvr.yaml
@@ -1,7 +1,7 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:09:59 2021
-epsilon: 3e-14
+epsilon: 5e-14
 prerequisites: ! |
   atom full
   fix temp/csvr
diff --git a/unittest/force-styles/tests/fix-timestep-temp_rescale.yaml b/unittest/force-styles/tests/fix-timestep-temp_rescale.yaml
index 9cb1a096e5..a97c507c86 100644
--- a/unittest/force-styles/tests/fix-timestep-temp_rescale.yaml
+++ b/unittest/force-styles/tests/fix-timestep-temp_rescale.yaml
@@ -1,7 +1,7 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:09:59 2021
-epsilon: 2e-13
+epsilon: 5e-13
 prerequisites: ! |
   atom full
   fix temp/rescale
diff --git a/unittest/force-styles/tests/improper-harmonic.yaml b/unittest/force-styles/tests/improper-harmonic.yaml
index fb147a2e71..10f58c12b6 100644
--- a/unittest/force-styles/tests/improper-harmonic.yaml
+++ b/unittest/force-styles/tests/improper-harmonic.yaml
@@ -1,7 +1,7 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Wed Feb 24 19:35:15 202
-epsilon: 2e-11
+epsilon: 5e-11
 prerequisites: ! |
   atom full
   improper harmonic
diff --git a/unittest/force-styles/tests/kspace-ewald_tilted.yaml b/unittest/force-styles/tests/kspace-ewald_tilted.yaml
index 18d6278187..c75eafdf12 100644
--- a/unittest/force-styles/tests/kspace-ewald_tilted.yaml
+++ b/unittest/force-styles/tests/kspace-ewald_tilted.yaml
@@ -1,7 +1,7 @@
 ---
 lammps_version: 30 Jul 2021
 date_generated: Tue Aug 24 16:00:03 2021
-epsilon: 8.5e-14
+epsilon: 1e-13
 skip_tests:
 prerequisites: ! |
   atom full
diff --git a/unittest/force-styles/tests/kspace-msm.yaml b/unittest/force-styles/tests/kspace-msm.yaml
index 13e2e0a2c2..d87e69ea69 100644
--- a/unittest/force-styles/tests/kspace-msm.yaml
+++ b/unittest/force-styles/tests/kspace-msm.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:26 2021
 epsilon: 5e-11
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/kspace-msm_cg.yaml b/unittest/force-styles/tests/kspace-msm_cg.yaml
index 90b5999796..49d5a420d1 100644
--- a/unittest/force-styles/tests/kspace-msm_cg.yaml
+++ b/unittest/force-styles/tests/kspace-msm_cg.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:26 2021
 epsilon: 5e-11
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/kspace-msm_nopbc.yaml b/unittest/force-styles/tests/kspace-msm_nopbc.yaml
index 9c071e90eb..ea02582ebf 100644
--- a/unittest/force-styles/tests/kspace-msm_nopbc.yaml
+++ b/unittest/force-styles/tests/kspace-msm_nopbc.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:27 2021
 epsilon: 5e-11
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/kspace-pppm_cg.yaml b/unittest/force-styles/tests/kspace-pppm_cg.yaml
index e6bb6c78f3..0e8ba9a541 100644
--- a/unittest/force-styles/tests/kspace-pppm_cg.yaml
+++ b/unittest/force-styles/tests/kspace-pppm_cg.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:29 2021
 epsilon: 7.5e-14
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/kspace-pppm_cg_ad.yaml b/unittest/force-styles/tests/kspace-pppm_cg_ad.yaml
index a8d9efc1fa..1883ed6cfe 100644
--- a/unittest/force-styles/tests/kspace-pppm_cg_ad.yaml
+++ b/unittest/force-styles/tests/kspace-pppm_cg_ad.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:29 2021
 epsilon: 7.5e-14
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/kspace-pppm_cg_tiled.yaml b/unittest/force-styles/tests/kspace-pppm_cg_tiled.yaml
index 270ee0418c..9111789f95 100644
--- a/unittest/force-styles/tests/kspace-pppm_cg_tiled.yaml
+++ b/unittest/force-styles/tests/kspace-pppm_cg_tiled.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:29 2021
 epsilon: 7.5e-14
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/kspace-pppm_dipole.yaml b/unittest/force-styles/tests/kspace-pppm_dipole.yaml
index 76c6516f51..e220730205 100644
--- a/unittest/force-styles/tests/kspace-pppm_dipole.yaml
+++ b/unittest/force-styles/tests/kspace-pppm_dipole.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 30 Jul 2021
+tags: slow
 date_generated: Sat Aug 21 20:49:01 2021
 epsilon: 5e-12
 skip_tests: extract gpu single
diff --git a/unittest/force-styles/tests/kspace-pppm_disp.yaml b/unittest/force-styles/tests/kspace-pppm_disp.yaml
index e7693c8980..2b09606811 100644
--- a/unittest/force-styles/tests/kspace-pppm_disp.yaml
+++ b/unittest/force-styles/tests/kspace-pppm_disp.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:30 2021
 epsilon: 2.5e-13
 skip_tests: intel
diff --git a/unittest/force-styles/tests/kspace-pppm_disp_ad.yaml b/unittest/force-styles/tests/kspace-pppm_disp_ad.yaml
index 11285b1a23..2aa71d6008 100644
--- a/unittest/force-styles/tests/kspace-pppm_disp_ad.yaml
+++ b/unittest/force-styles/tests/kspace-pppm_disp_ad.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:31 2021
 epsilon: 2.5e-13
 skip_tests: intel
diff --git a/unittest/force-styles/tests/kspace-pppm_disp_ad_only.yaml b/unittest/force-styles/tests/kspace-pppm_disp_ad_only.yaml
index 81380966d8..61e6cc2a8b 100644
--- a/unittest/force-styles/tests/kspace-pppm_disp_ad_only.yaml
+++ b/unittest/force-styles/tests/kspace-pppm_disp_ad_only.yaml
@@ -1,7 +1,7 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:09:31 2021
-epsilon: 2.5e-13
+epsilon: 5e-13
 skip_tests: intel
 prerequisites: ! |
   atom full
diff --git a/unittest/force-styles/tests/kspace-pppm_disp_tip4p.yaml b/unittest/force-styles/tests/kspace-pppm_disp_tip4p.yaml
index 047a623995..8fae3e1de0 100644
--- a/unittest/force-styles/tests/kspace-pppm_disp_tip4p.yaml
+++ b/unittest/force-styles/tests/kspace-pppm_disp_tip4p.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:32 2021
 epsilon: 2.5e-13
 skip_tests: intel
diff --git a/unittest/force-styles/tests/kspace-pppm_slab.yaml b/unittest/force-styles/tests/kspace-pppm_slab.yaml
index aa1566aab5..2d9f1e939c 100644
--- a/unittest/force-styles/tests/kspace-pppm_slab.yaml
+++ b/unittest/force-styles/tests/kspace-pppm_slab.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:32 2021
 epsilon: 7.5e-14
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/kspace-pppm_stagger.yaml b/unittest/force-styles/tests/kspace-pppm_stagger.yaml
index ea24b6cfd3..58f684eef7 100644
--- a/unittest/force-styles/tests/kspace-pppm_stagger.yaml
+++ b/unittest/force-styles/tests/kspace-pppm_stagger.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:33 2021
 epsilon: 7.5e-14
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/kspace-pppm_stagger_tiled.yaml b/unittest/force-styles/tests/kspace-pppm_stagger_tiled.yaml
index cb8ba3813e..ebb93f1e9a 100644
--- a/unittest/force-styles/tests/kspace-pppm_stagger_tiled.yaml
+++ b/unittest/force-styles/tests/kspace-pppm_stagger_tiled.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:33 2021
 epsilon: 7.5e-14
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/kspace-pppm_tiled.yaml b/unittest/force-styles/tests/kspace-pppm_tiled.yaml
index d1b95c8ca9..b68b19aa4e 100644
--- a/unittest/force-styles/tests/kspace-pppm_tiled.yaml
+++ b/unittest/force-styles/tests/kspace-pppm_tiled.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:33 2021
 epsilon: 7.5e-14
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/kspace-pppm_tip4p.yaml b/unittest/force-styles/tests/kspace-pppm_tip4p.yaml
index f5785b54d7..e40c14a713 100644
--- a/unittest/force-styles/tests/kspace-pppm_tip4p.yaml
+++ b/unittest/force-styles/tests/kspace-pppm_tip4p.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:33 2021
 epsilon: 2e-13
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/kspace-pppm_tip4p_ad.yaml b/unittest/force-styles/tests/kspace-pppm_tip4p_ad.yaml
index 219addb5f0..56ce1ff511 100644
--- a/unittest/force-styles/tests/kspace-pppm_tip4p_ad.yaml
+++ b/unittest/force-styles/tests/kspace-pppm_tip4p_ad.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:34 2021
 epsilon: 4e-13
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/kspace-pppm_tip4p_nozforce.yaml b/unittest/force-styles/tests/kspace-pppm_tip4p_nozforce.yaml
index 846e1a8605..4a75db579a 100644
--- a/unittest/force-styles/tests/kspace-pppm_tip4p_nozforce.yaml
+++ b/unittest/force-styles/tests/kspace-pppm_tip4p_nozforce.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:34 2021
 epsilon: 2e-13
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/kspace-pppm_tip4p_slab.yaml b/unittest/force-styles/tests/kspace-pppm_tip4p_slab.yaml
index 35a8ef56f5..51c5a45941 100644
--- a/unittest/force-styles/tests/kspace-pppm_tip4p_slab.yaml
+++ b/unittest/force-styles/tests/kspace-pppm_tip4p_slab.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:34 2021
 epsilon: 5e-13
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/manybody-pair-airebo.yaml b/unittest/force-styles/tests/manybody-pair-airebo.yaml
index 58c81fb093..8b0eda5567 100644
--- a/unittest/force-styles/tests/manybody-pair-airebo.yaml
+++ b/unittest/force-styles/tests/manybody-pair-airebo.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:10 2021
 epsilon: 5e-06
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/manybody-pair-airebo_00.yaml b/unittest/force-styles/tests/manybody-pair-airebo_00.yaml
index aa9aea8ca9..62a56f5ab1 100644
--- a/unittest/force-styles/tests/manybody-pair-airebo_00.yaml
+++ b/unittest/force-styles/tests/manybody-pair-airebo_00.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:11 2021
 epsilon: 1e-07
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/manybody-pair-airebo_m.yaml b/unittest/force-styles/tests/manybody-pair-airebo_m.yaml
index ae1e670cea..67b14b05c9 100644
--- a/unittest/force-styles/tests/manybody-pair-airebo_m.yaml
+++ b/unittest/force-styles/tests/manybody-pair-airebo_m.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:11 2021
 epsilon: 1e-07
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/manybody-pair-airebo_m00.yaml b/unittest/force-styles/tests/manybody-pair-airebo_m00.yaml
index eecfd2a08e..73c6054ec0 100644
--- a/unittest/force-styles/tests/manybody-pair-airebo_m00.yaml
+++ b/unittest/force-styles/tests/manybody-pair-airebo_m00.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:11 2021
 epsilon: 1e-07
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/manybody-pair-bop.yaml b/unittest/force-styles/tests/manybody-pair-bop.yaml
index 8260b16d21..f809a2db66 100644
--- a/unittest/force-styles/tests/manybody-pair-bop.yaml
+++ b/unittest/force-styles/tests/manybody-pair-bop.yaml
@@ -1,7 +1,8 @@
 ---
 lammps_version: 8 Apr 2021
+tags: slow, unstable
 date_generated: Wed May  5 11:50:15 2021
-epsilon: 5e-13
+epsilon: 5e-12
 prerequisites: ! |
   pair bop
 pre_commands: ! |
diff --git a/unittest/force-styles/tests/manybody-pair-bop_save.yaml b/unittest/force-styles/tests/manybody-pair-bop_save.yaml
index e5699cf8b8..77388eb6d6 100644
--- a/unittest/force-styles/tests/manybody-pair-bop_save.yaml
+++ b/unittest/force-styles/tests/manybody-pair-bop_save.yaml
@@ -1,7 +1,8 @@
 ---
 lammps_version: 8 Apr 2021
+tags: slow, unstable
 date_generated: Wed May  5 11:50:24 2021
-epsilon: 9e-13
+epsilon: 2e-11
 prerequisites: ! |
   pair bop
 pre_commands: ! |
diff --git a/unittest/force-styles/tests/manybody-pair-comb.yaml b/unittest/force-styles/tests/manybody-pair-comb.yaml
index d41aa476db..b64cc2a6e9 100644
--- a/unittest/force-styles/tests/manybody-pair-comb.yaml
+++ b/unittest/force-styles/tests/manybody-pair-comb.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow, unstable
 date_generated: Fri Feb 26 23:09:14 2021
 epsilon: 1e-12
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/manybody-pair-comb3.yaml b/unittest/force-styles/tests/manybody-pair-comb3.yaml
index 2238108055..6c8290cb10 100644
--- a/unittest/force-styles/tests/manybody-pair-comb3.yaml
+++ b/unittest/force-styles/tests/manybody-pair-comb3.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow, unstable
 date_generated: Fri Feb 26 23:09:14 2021
 epsilon: 1e-13
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/manybody-pair-drip.yaml b/unittest/force-styles/tests/manybody-pair-drip.yaml
index f36436183a..15e71eaad3 100644
--- a/unittest/force-styles/tests/manybody-pair-drip.yaml
+++ b/unittest/force-styles/tests/manybody-pair-drip.yaml
@@ -1,7 +1,8 @@
 ---
 lammps_version: 30 Jul 2021
+tags: slow, unstable
 date_generated: Tue Aug 24 15:36:39 2021
-epsilon: 7.5e-11
+epsilon: 7.5e-09
 skip_tests: single
 prerequisites: ! |
   pair drip
diff --git a/unittest/force-styles/tests/manybody-pair-drip_real.yaml b/unittest/force-styles/tests/manybody-pair-drip_real.yaml
index 78a9d0e6a3..0a332c7c1f 100644
--- a/unittest/force-styles/tests/manybody-pair-drip_real.yaml
+++ b/unittest/force-styles/tests/manybody-pair-drip_real.yaml
@@ -1,7 +1,8 @@
 ---
 lammps_version: 30 Jul 2021
+tags: slow, unstable
 date_generated: Tue Aug 24 15:36:41 2021
-epsilon: 2e-10
+epsilon: 8e-9
 skip_tests: single
 prerequisites: ! |
   pair drip
diff --git a/unittest/force-styles/tests/manybody-pair-ilp-graphene-hbn.yaml b/unittest/force-styles/tests/manybody-pair-ilp-graphene-hbn.yaml
index ec91e147ad..ee946d0534 100644
--- a/unittest/force-styles/tests/manybody-pair-ilp-graphene-hbn.yaml
+++ b/unittest/force-styles/tests/manybody-pair-ilp-graphene-hbn.yaml
@@ -1,7 +1,8 @@
 ---
 lammps_version: 30 Jul 2021
+tags: slow, unstable
 date_generated: Tue Aug 24 15:36:42 2021
-epsilon: 5e-13
+epsilon: 5e-12
 skip_tests: single
 prerequisites: ! |
   pair ilp/graphene/hbn
diff --git a/unittest/force-styles/tests/manybody-pair-ilp-graphene-hbn_notaper.yaml b/unittest/force-styles/tests/manybody-pair-ilp-graphene-hbn_notaper.yaml
index 51d72dc40b..ba7ccf6856 100644
--- a/unittest/force-styles/tests/manybody-pair-ilp-graphene-hbn_notaper.yaml
+++ b/unittest/force-styles/tests/manybody-pair-ilp-graphene-hbn_notaper.yaml
@@ -1,7 +1,8 @@
 ---
 lammps_version: 30 Jul 2021
+tags: slow, unstable
 date_generated: Tue Aug 24 15:36:45 2021
-epsilon: 9e-13
+epsilon: 1e-11
 skip_tests: single
 prerequisites: ! |
   pair ilp/graphene/hbn
diff --git a/unittest/force-styles/tests/manybody-pair-kolmogorov_crespi_full.yaml b/unittest/force-styles/tests/manybody-pair-kolmogorov_crespi_full.yaml
index aa14a037d9..28430b75d4 100644
--- a/unittest/force-styles/tests/manybody-pair-kolmogorov_crespi_full.yaml
+++ b/unittest/force-styles/tests/manybody-pair-kolmogorov_crespi_full.yaml
@@ -1,7 +1,8 @@
 ---
 lammps_version: 30 Jul 2021
+tags: slow, unstable
 date_generated: Tue Aug 24 15:36:47 2021
-epsilon: 5e-12
+epsilon: 5e-11
 skip_tests: single
 prerequisites: ! |
   pair kolmogorov/crespi/full
diff --git a/unittest/force-styles/tests/manybody-pair-kolmogorov_crespi_full_notaper.yaml b/unittest/force-styles/tests/manybody-pair-kolmogorov_crespi_full_notaper.yaml
index dfa6249013..2e0fac74e1 100644
--- a/unittest/force-styles/tests/manybody-pair-kolmogorov_crespi_full_notaper.yaml
+++ b/unittest/force-styles/tests/manybody-pair-kolmogorov_crespi_full_notaper.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 30 Jul 2021
+tags: slow, unstable
 date_generated: Tue Aug 24 15:36:49 2021
 epsilon: 5e-12
 skip_tests: single
diff --git a/unittest/force-styles/tests/manybody-pair-kolmogorov_crespi_z.yaml b/unittest/force-styles/tests/manybody-pair-kolmogorov_crespi_z.yaml
index e59d9851ea..e1f3d7136b 100644
--- a/unittest/force-styles/tests/manybody-pair-kolmogorov_crespi_z.yaml
+++ b/unittest/force-styles/tests/manybody-pair-kolmogorov_crespi_z.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 30 Jul 2021
+tags: slow, unstable
 date_generated: Wed Aug 25 07:14:32 2021
 epsilon: 5e-13
 skip_tests: single
diff --git a/unittest/force-styles/tests/manybody-pair-mliap_nn.yaml b/unittest/force-styles/tests/manybody-pair-mliap_nn.yaml
index 5270c9571f..04f742536a 100644
--- a/unittest/force-styles/tests/manybody-pair-mliap_nn.yaml
+++ b/unittest/force-styles/tests/manybody-pair-mliap_nn.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Mar 2021
+tags: slow
 date_generated: Wed Mar 24 12:18:23 202
 epsilon: 5e-13
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/manybody-pair-mliap_snap_chem.yaml b/unittest/force-styles/tests/manybody-pair-mliap_snap_chem.yaml
index 99f36d8c65..08ebfed3b3 100644
--- a/unittest/force-styles/tests/manybody-pair-mliap_snap_chem.yaml
+++ b/unittest/force-styles/tests/manybody-pair-mliap_snap_chem.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:16 2021
 epsilon: 5e-13
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/manybody-pair-mliap_snap_linear.yaml b/unittest/force-styles/tests/manybody-pair-mliap_snap_linear.yaml
index 3650405db1..43d7660823 100644
--- a/unittest/force-styles/tests/manybody-pair-mliap_snap_linear.yaml
+++ b/unittest/force-styles/tests/manybody-pair-mliap_snap_linear.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:15 2021
 epsilon: 5e-13
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/manybody-pair-mliap_snap_quadratic.yaml b/unittest/force-styles/tests/manybody-pair-mliap_snap_quadratic.yaml
index 475fc1caac..b07b4fa5b5 100644
--- a/unittest/force-styles/tests/manybody-pair-mliap_snap_quadratic.yaml
+++ b/unittest/force-styles/tests/manybody-pair-mliap_snap_quadratic.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Mar 2021
+tags: slow
 date_generated: Wed Mar 24 12:24:38 202
 epsilon: 5e-13
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/manybody-pair-mliap_so3.yaml b/unittest/force-styles/tests/manybody-pair-mliap_so3.yaml
index 86fc0ac545..a4efa2c6e0 100644
--- a/unittest/force-styles/tests/manybody-pair-mliap_so3.yaml
+++ b/unittest/force-styles/tests/manybody-pair-mliap_so3.yaml
@@ -1,7 +1,8 @@
 ---
 lammps_version: 27 May 2021
+tags: slow, unstable
 date_generated: Sun Jun 13 17:44:07 2021
-epsilon: 2.5e-11
+epsilon: 5e-11
 skip_tests:
 prerequisites: ! |
   pair mliap
diff --git a/unittest/force-styles/tests/manybody-pair-nb3b_harmonic.yaml b/unittest/force-styles/tests/manybody-pair-nb3b_harmonic.yaml
index 1eef3f085b..4701c79ad3 100644
--- a/unittest/force-styles/tests/manybody-pair-nb3b_harmonic.yaml
+++ b/unittest/force-styles/tests/manybody-pair-nb3b_harmonic.yaml
@@ -1,7 +1,8 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:09:17 2021
-epsilon: 1e-12
+tags: unstable
+epsilon: 2e-12
 prerequisites: ! |
   pair nb3b/harmonic
 pre_commands: ! |
diff --git a/unittest/force-styles/tests/manybody-pair-polymorphic_sw.yaml b/unittest/force-styles/tests/manybody-pair-polymorphic_sw.yaml
index cccc15256b..7e1e6acfd4 100644
--- a/unittest/force-styles/tests/manybody-pair-polymorphic_sw.yaml
+++ b/unittest/force-styles/tests/manybody-pair-polymorphic_sw.yaml
@@ -1,7 +1,8 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:09:17 2021
-epsilon: 1.5e-13
+tags: unstable
+epsilon: 2.5e-12
 prerequisites: ! |
   pair polymorphic
 pre_commands: ! |
diff --git a/unittest/force-styles/tests/manybody-pair-polymorphic_tersoff.yaml b/unittest/force-styles/tests/manybody-pair-polymorphic_tersoff.yaml
index 0b12fd084c..f5706c6dde 100644
--- a/unittest/force-styles/tests/manybody-pair-polymorphic_tersoff.yaml
+++ b/unittest/force-styles/tests/manybody-pair-polymorphic_tersoff.yaml
@@ -1,7 +1,8 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:09:17 2021
-epsilon: 1e-13
+tags: unstable
+epsilon: 5e-13
 prerequisites: ! |
   pair polymorphic
 pre_commands: ! |
diff --git a/unittest/force-styles/tests/manybody-pair-rann.yaml b/unittest/force-styles/tests/manybody-pair-rann.yaml
index a5fb526c83..b93631ce5d 100644
--- a/unittest/force-styles/tests/manybody-pair-rann.yaml
+++ b/unittest/force-styles/tests/manybody-pair-rann.yaml
@@ -1,7 +1,8 @@
 ---
 lammps_version: 27 May 2021
+tags: slow
 date_generated: Sun Jun 20 22:01:27 2021
-epsilon: 1e-13
+epsilon: 2e-13
 prerequisites: ! |
   pair rann
 pre_commands: ! |
diff --git a/unittest/force-styles/tests/manybody-pair-rebo.yaml b/unittest/force-styles/tests/manybody-pair-rebo.yaml
index 2e07aad8d6..bf9c43ec81 100644
--- a/unittest/force-styles/tests/manybody-pair-rebo.yaml
+++ b/unittest/force-styles/tests/manybody-pair-rebo.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:18 2021
 epsilon: 1e-07
 skip_tests: intel
diff --git a/unittest/force-styles/tests/manybody-pair-snap.yaml b/unittest/force-styles/tests/manybody-pair-snap.yaml
index 57e0e9d599..378229072e 100644
--- a/unittest/force-styles/tests/manybody-pair-snap.yaml
+++ b/unittest/force-styles/tests/manybody-pair-snap.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:18 2021
 epsilon: 5e-13
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/manybody-pair-snap_chem.yaml b/unittest/force-styles/tests/manybody-pair-snap_chem.yaml
index b97709863e..80b19b09f8 100644
--- a/unittest/force-styles/tests/manybody-pair-snap_chem.yaml
+++ b/unittest/force-styles/tests/manybody-pair-snap_chem.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:09:18 2021
 epsilon: 5e-13
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/manybody-pair-tersoff_table.yaml b/unittest/force-styles/tests/manybody-pair-tersoff_table.yaml
index 036acc25d1..06b27e874f 100644
--- a/unittest/force-styles/tests/manybody-pair-tersoff_table.yaml
+++ b/unittest/force-styles/tests/manybody-pair-tersoff_table.yaml
@@ -1,7 +1,8 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow, unstable
 date_generated: Fri Feb 26 23:09:20 2021
-epsilon: 5e-11
+epsilon: 9e-10
 prerequisites: ! |
   pair tersoff/table
 pre_commands: ! |
diff --git a/unittest/force-styles/tests/mol-pair-lj_charmm_coul_long_soft.yaml b/unittest/force-styles/tests/mol-pair-lj_charmm_coul_long_soft.yaml
index 955d36491b..ddc944f84b 100644
--- a/unittest/force-styles/tests/mol-pair-lj_charmm_coul_long_soft.yaml
+++ b/unittest/force-styles/tests/mol-pair-lj_charmm_coul_long_soft.yaml
@@ -1,7 +1,7 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:08:45 2021
-epsilon: 2.5e-12
+epsilon: 5e-12
 prerequisites: ! |
   atom full
   pair lj/charmm/coul/long/soft
diff --git a/unittest/force-styles/tests/mol-pair-lj_charmm_coul_msm.yaml b/unittest/force-styles/tests/mol-pair-lj_charmm_coul_msm.yaml
index 04670511d0..c374ba6631 100644
--- a/unittest/force-styles/tests/mol-pair-lj_charmm_coul_msm.yaml
+++ b/unittest/force-styles/tests/mol-pair-lj_charmm_coul_msm.yaml
@@ -1,7 +1,7 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:08:46 2021
-epsilon: 5e-14
+epsilon: 6e-14
 prerequisites: ! |
   atom full
   pair lj/charmm/coul/msm
diff --git a/unittest/force-styles/tests/mol-pair-lj_cut_coul_long_soft.yaml b/unittest/force-styles/tests/mol-pair-lj_cut_coul_long_soft.yaml
index db9f33fa87..70f45edc6f 100644
--- a/unittest/force-styles/tests/mol-pair-lj_cut_coul_long_soft.yaml
+++ b/unittest/force-styles/tests/mol-pair-lj_cut_coul_long_soft.yaml
@@ -1,7 +1,7 @@
 ---
 lammps_version: 10 Feb 2021
 date_generated: Fri Feb 26 23:08:48 2021
-epsilon: 2.5e-12
+epsilon: 5e-12
 prerequisites: ! |
   atom full
   pair lj/cut/coul/long/soft
diff --git a/unittest/force-styles/tests/mol-pair-lj_long_tip4p_long.yaml b/unittest/force-styles/tests/mol-pair-lj_long_tip4p_long.yaml
index 25ac675244..50a03799be 100644
--- a/unittest/force-styles/tests/mol-pair-lj_long_tip4p_long.yaml
+++ b/unittest/force-styles/tests/mol-pair-lj_long_tip4p_long.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:08:51 2021
 epsilon: 2.5e-09
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/mol-pair-lj_table_coul_table.yaml b/unittest/force-styles/tests/mol-pair-lj_table_coul_table.yaml
index c02f9a31dd..5d919a85e4 100644
--- a/unittest/force-styles/tests/mol-pair-lj_table_coul_table.yaml
+++ b/unittest/force-styles/tests/mol-pair-lj_table_coul_table.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:08:53 2021
 epsilon: 2.5e-09
 skip_tests: gpu
diff --git a/unittest/force-styles/tests/mol-pair-lj_table_tip4p_long.yaml b/unittest/force-styles/tests/mol-pair-lj_table_tip4p_long.yaml
index 7eab70a542..a1bd0e412b 100644
--- a/unittest/force-styles/tests/mol-pair-lj_table_tip4p_long.yaml
+++ b/unittest/force-styles/tests/mol-pair-lj_table_tip4p_long.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:08:54 2021
 epsilon: 2.5e-09
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/mol-pair-lj_table_tip4p_table.yaml b/unittest/force-styles/tests/mol-pair-lj_table_tip4p_table.yaml
index 8274c80cdc..1630d752df 100644
--- a/unittest/force-styles/tests/mol-pair-lj_table_tip4p_table.yaml
+++ b/unittest/force-styles/tests/mol-pair-lj_table_tip4p_table.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:08:54 2021
 epsilon: 2.5e-09
 prerequisites: ! |
diff --git a/unittest/force-styles/tests/mol-pair-table.yaml b/unittest/force-styles/tests/mol-pair-table.yaml
index 2d0ff80bd3..fb9e647677 100644
--- a/unittest/force-styles/tests/mol-pair-table.yaml
+++ b/unittest/force-styles/tests/mol-pair-table.yaml
@@ -1,5 +1,6 @@
 ---
 lammps_version: 10 Feb 2021
+tags: slow
 date_generated: Fri Feb 26 23:08:56 2021
 epsilon: 5e-14
 prerequisites: ! |