diff --git a/tests/Makefile b/tests/Makefile
index 0fc645f2f..2c93b945a 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -4,8 +4,8 @@ FLAGS =
 ifeq ($(UPDATE_TESTS), true)
 	FLAGS += --update-tests
 endif
-ifeq ($(FAIL_FAST), true)
-	FLAGS += --fail-fast
+ifeq ($(FAIL_FAST), false)
+	FLAGS += --no-fail-fast
 endif
 
 # This is the default pseudo-target. It runs all the tests.