diff --git a/tests/qemu-iotests/226 b/tests/qemu-iotests/226
index 460aea2fc9..34987d43f9 100755
--- a/tests/qemu-iotests/226
+++ b/tests/qemu-iotests/226
@@ -41,6 +41,9 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
 
 # Generic format, but tests file-protocol specific error handling
 _supported_fmt generic
+if [ "$IMGOPTSSYNTAX" = "true" ]; then
+    _unsupported_fmt $IMGFMT
+fi
 _supported_proto file
 _supported_os Linux