diff --git a/unittest/commands/test_variables.cpp b/unittest/commands/test_variables.cpp
index 4f603df5ac..86d880f22c 100644
--- a/unittest/commands/test_variables.cpp
+++ b/unittest/commands/test_variables.cpp
@@ -59,8 +59,8 @@ protected:
     void TearDown() override
     {
         LAMMPSTest::TearDown();
-        unlink("test_variable.file");
-        unlink("test_variable.atomfile");
+        platform::unlink("test_variable.file");
+        platform::unlink("test_variable.atomfile");
     }
 
     void atomic_system()
@@ -165,7 +165,7 @@ TEST_F(VariableTest, CreateDelete)
     fputs(" ", fp);
     fclose(fp);
     ASSERT_THAT(variable->retrieve("file"), StrEq("1"));
-    unlink("MYFILE");
+    platform::unlink("MYFILE");
     ASSERT_THAT(variable->retrieve("file"), StrEq("0"));
 
     BEGIN_HIDE_OUTPUT();
diff --git a/unittest/formats/test_text_file_reader.cpp b/unittest/formats/test_text_file_reader.cpp
index f0f695ae54..36f1c8d87c 100644
--- a/unittest/formats/test_text_file_reader.cpp
+++ b/unittest/formats/test_text_file_reader.cpp
@@ -35,8 +35,8 @@ class TextFileReaderTest : public ::testing::Test {
 protected:
     void TearDown() override
     {
-        unlink("text_reader_one.file");
-        unlink("text_reader_two.file");
+        platform::unlink("text_reader_one.file");
+        platform::unlink("text_reader_two.file");
     }
 
     void test_files()
@@ -73,7 +73,7 @@ TEST_F(TextFileReaderTest, permissions)
     chmod("text_reader_noperms.file", 0);
     ASSERT_THROW({ TextFileReader reader("text_reader_noperms.file", "test"); },
                  FileReaderException);
-    unlink("text_reader_noperms.file");
+    platform::unlink("text_reader_noperms.file");
 }
 
 TEST_F(TextFileReaderTest, nofp)