Try a workaround

tests/CMakeLists.txt

@@ -118,14 +118,16 @@ if(PROJECT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
       add_executable(${test_name} ${test_file})
       target_link_libraries(${test_name} PRIVATE libassert-lib)
       target_include_directories(${test_name} PRIVATE src)
-      target_compile_features(${test_name} PUBLIC cxx_std_20)
-      add_test(NAME ${test_name} COMMAND ${test_name})
+      target_compile_features(${test_name} PUBLIC cxx_std_17)
+      # add_test(NAME ${test_name} COMMAND ${test_name})
+      add_test(NAME ${test_name} COMMAND ci-wrapper.py $<TARGET_FILE:${test_name}>)
       list(APPEND dsym_targets ${test_name})
     endforeach()
 
     target_link_libraries(lexer PRIVATE GTest::gtest_main)
     target_link_libraries(fmt-test PRIVATE GTest::gtest_main fmt::fmt)
     target_link_libraries(assertion_tests PRIVATE GTest::gtest_main)
+    target_compile_options(assertion_tests PRIVATE $<$<CXX_COMPILER_ID:MSVC>:/permissive- /Zc:preprocessor>)
     target_compile_definitions(fmt-test PRIVATE LIBASSERT_USE_FMT)
     target_compile_options(lexer PRIVATE $<$<CXX_COMPILER_ID:MSVC>:/Zc:preprocessor>)
     target_compile_options(fmt-test PRIVATE $<$<CXX_COMPILER_ID:MSVC>:/Zc:preprocessor>)

tests/ci-wrapper.py

@@ -0,0 +1,23 @@
+# -*- coding: utf-8 -*-
+import os
+import subprocess
+import sys
+
+env = os.environ.copy()
+lp = "{}/../bin".format(os.path.dirname(os.path.realpath(__file__)))
+if "LD_LIBRARY_PATH" in env:
+    env["LD_LIBRARY_PATH"] += ":" + lp
+else:
+    env["LD_LIBRARY_PATH"] = lp
+
+# Workaround for https://github.com/actions/runner-images/issues/8803
+buggy_path = "C:\\Program Files\\Git\\mingw64\\bin;C:\\Program Files\\Git\\usr\\bin;C:\\Users\\runneradmin\\bin;"
+if env["PATH"].startswith(buggy_path):
+    env["PATH"] = env["PATH"].replace(buggy_path, "", 1)
+
+p = subprocess.Popen(
+    sys.argv[1:],
+    env=env
+)
+p.wait()
+sys.exit(p.returncode)