diff --git a/tests/tests.yml b/tests/tests.yml
index c838a66..9cda033 100644
--- a/tests/tests.yml
+++ b/tests/tests.yml
@@ -30,7 +30,7 @@
         run: VERSION=3.9 PYTHON=python3-debug X="-x test_wsgiref" ./parallel.sh
     - optimizedflags:
         dir: python/flags
-        run: "python{{ pybasever }} ./assertflags.py -O3"
+        run: python3 ./assertflags.py -O3
     - debugflags:
         dir: python/flags
         run: python3-debug ./assertflags.py -O0