diff --git a/tests/tests.yml b/tests/tests.yml
index a3eb1b2..1af5868 100644
--- a/tests/tests.yml
+++ b/tests/tests.yml
@@ -24,11 +24,10 @@
         run: VERSION=3.10 X="" ./parallel.sh
     - marshalparser:
         dir: python/marshalparser
-        run: VERSION=3.10 SAMPLE=10 test_marshalparser_compatibility.sh
+        run: INSTALL_OR_SKIP=true VERSION=3.10 SAMPLE=10 test_marshalparser_compatibility.sh
     required_packages:
     - gcc  # for extension building in venv and selftest
     - gdb  # for test_gdb
     - python3.10
     - python3-tox  # for venv tests
     - glibc-all-langpacks # for locale tests
-    - marshalparser  # for testing compatibility (magic numbers) with marshalparser