diff --git a/unittest/CMakeLists.txt b/unittest/CMakeLists.txt
index 119e514207..bab92d1be7 100644
--- a/unittest/CMakeLists.txt
+++ b/unittest/CMakeLists.txt
@@ -25,7 +25,7 @@ add_test(NAME RunLammps
          COMMAND $<TARGET_FILE:lmp> -log none -echo none -in in.empty
          WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
 set_tests_properties(RunLammps PROPERTIES
-	ENVIRONMENT "TSAN_OPTIONS=ignore_noninstrumented_modules=1;HWLOC_HIDE_ERRORS=1"
+        ENVIRONMENT "TSAN_OPTIONS=ignore_noninstrumented_modules=1;HWLOC_HIDE_ERRORS=1"
         PASS_REGULAR_EXPRESSION "LAMMPS \\([0-9]+ [A-Za-z]+ 2[0-9][0-9][0-9]( - Update [0-9]+)?\\)")
 
 # check if the compiled executable will print the help message
@@ -33,7 +33,7 @@ add_test(NAME HelpMessage
          COMMAND $<TARGET_FILE:lmp> -h
          WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
 set_tests_properties(HelpMessage PROPERTIES
-	ENVIRONMENT "TSAN_OPTIONS=ignore_noninstrumented_modules=1;HWLOC_HIDE_ERRORS=1"
+        ENVIRONMENT "TSAN_OPTIONS=ignore_noninstrumented_modules=1;HWLOC_HIDE_ERRORS=1"
          PASS_REGULAR_EXPRESSION ".*Large-scale Atomic/Molecular Massively Parallel Simulator -.*Usage example:.*")
 
 # check if the compiled executable will error out on an invalid command line flag
@@ -41,7 +41,7 @@ add_test(NAME InvalidFlag
          COMMAND $<TARGET_FILE:lmp> -xxx
          WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
 set_tests_properties(InvalidFlag PROPERTIES
-	ENVIRONMENT "TSAN_OPTIONS=ignore_noninstrumented_modules=1;HWLOC_HIDE_ERRORS=1"
+        ENVIRONMENT "TSAN_OPTIONS=ignore_noninstrumented_modules=1;HWLOC_HIDE_ERRORS=1"
          PASS_REGULAR_EXPRESSION "ERROR: Invalid command-line argument.*")
 
 # convenience function for adding tests requiring to be run in parallel with MPI