diff --git a/Makefile.am b/Makefile.am
index e1ddf0da7..ca3172783 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -219,7 +219,7 @@ CLEANFILES = \
 # is NOT a substitute for proper testing!
 
 quickcheck:
-	./run test-tool/libguestfs-test-tool
+	./run test-tool/libguestfs-test-tool $(QUICKCHECK_TEST_TOOL_ARGS)
 
 # Make binary distribution.