diff --git a/Lib/test/support/__init__.py b/Lib/test/support/__init__.py
index 059542c24335a2..26cd880d227855 100644
--- a/Lib/test/support/__init__.py
+++ b/Lib/test/support/__init__.py
@@ -768,7 +768,11 @@ def python_is_optimized():
     for opt in cflags.split():
         if opt.startswith('-O'):
             final_opt = opt
-    return final_opt not in ('', '-O0', '-Og')
+    if sysconfig.get_config_var("CC") == "gcc":
+        non_opts = ('', '-O0', '-Og')
+    else:
+        non_opts = ('', '-O0')
+    return final_opt not in non_opts
 
 
 def check_cflags_pgo():