fix test

danmar · danmar · commit b3115e03d931 · 2023-11-26T12:44:18.000+01:00
diff --git a/test/cli/test-performance.py b/test/cli/test-performance.py
@@ -141,7 +141,7 @@ def test_slow_exprid(tmpdir):
 }
         """)
 
-    my_env = os.environ
+    my_env = os.environ.copy()
     my_env["DISABLE_VALUEFLOW"] = "1"
     cppcheck([filename], env=my_env)
 
