diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ce79e609f..7e0151860 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -867,22 +867,18 @@ jobs:
         run: python3 scripts/run_tests.py --running-type="threads"
         env:
           OMP_NUM_THREADS: 1
-          CLANG_BUILD: 1
       - name: Run tests (threads, num_threads=2)
         run: python3 scripts/run_tests.py --running-type="threads"
         env:
           OMP_NUM_THREADS: 2
-          CLANG_BUILD: 1
       - name: Run tests (threads, num_threads=3)
         run: python3 scripts/run_tests.py --running-type="threads"
         env:
           OMP_NUM_THREADS: 3
-          CLANG_BUILD: 1
       - name: Run tests (threads, num_threads=4)
         run: python3 scripts/run_tests.py --running-type="threads"
         env:
           OMP_NUM_THREADS: 4
-          CLANG_BUILD: 1
   windows-clang-test-extended:
     needs:
       - windows-clang-test
@@ -911,22 +907,18 @@ jobs:
         run: python3 scripts/run_tests.py --running-type="threads"
         env:
           OMP_NUM_THREADS: 5
-          CLANG_BUILD: 1
       - name: Run tests (threads, num_threads=7)
         run: python3 scripts/run_tests.py --running-type="threads"
         env:
           OMP_NUM_THREADS: 7
-          CLANG_BUILD: 1
       - name: Run tests (threads, num_threads=11)
         run: python3 scripts/run_tests.py --running-type="threads"
         env:
           OMP_NUM_THREADS: 11
-          CLANG_BUILD: 1
       - name: Run tests (threads, num_threads=13)
         run: python3 scripts/run_tests.py --running-type="threads"
         env:
           OMP_NUM_THREADS: 13
-          CLANG_BUILD: 1
   ubuntu-gcc-build-codecov:
     needs:
       - ubuntu-gcc-test-extended
diff --git a/scripts/run_tests.py b/scripts/run_tests.py
index d2953f0f9..a0e1251c2 100644
--- a/scripts/run_tests.py
+++ b/scripts/run_tests.py
@@ -85,9 +85,6 @@ def run_threads(self):
         self.__run_exec(f"{self.work_dir / 'seq_func_tests'} {self.__get_gtest_settings(3)}")
         self.__run_exec(f"{self.work_dir / 'stl_func_tests'} {self.__get_gtest_settings(3)}")
         self.__run_exec(f"{self.work_dir / 'tbb_func_tests'} {self.__get_gtest_settings(3)}")
-
-        if os.environ.get("CLANG_BUILD") == "1":
-            return
         self.__run_exec(f"{self.work_dir / 'omp_func_tests'} {self.__get_gtest_settings(3)}")
 
     def run_core(self):
@@ -97,9 +94,6 @@ def run_core(self):
         self.__run_exec(f"{self.work_dir / 'core_func_tests'} {self.__get_gtest_settings(1)}")
 
     def run_processes(self, additional_mpi_args):
-        if os.environ.get("CLANG_BUILD") == "1":
-            return
-
         proc_count = os.environ.get("PROC_COUNT")
         if proc_count is None:
             raise EnvironmentError("Required environment variable 'PROC_COUNT' is not set.")