diff --git a/marshalparser/test_marshalparser_compatibility.sh b/marshalparser/test_marshalparser_compatibility.sh
index 2c8d254..2d32537 100755
--- a/marshalparser/test_marshalparser_compatibility.sh
+++ b/marshalparser/test_marshalparser_compatibility.sh
@@ -15,6 +15,16 @@ VERSION=${VERSION:-3.9}
 # How many randomly-selected pyc files to check?
 SAMPLE=${SAMPLE:-50}
 
+# This allows us to test marshalparser optionally: on Fedora 33+ only
+INSTALL_OR_SKIP=${INSTALL_OR_SKIP:-false}
+if [ "$INSTALL_OR_SKIP" == "true" ] && [ ! -f "/usr/bin/marshalparser" ]; then
+  dnf -y install marshalparser || :
+  if [ ! -f "/usr/bin/marshalparser" ]; then
+    echo "marshalparser not installable, skipping this test"
+    exit 0
+  fi
+fi
+
 path="/usr/lib*/python$VERSION/"
 
 for file in `find $path -name "*.pyc" | shuf | head -n $SAMPLE`; do