diff --git a/test/integration/Makefile b/test/integration/Makefile
index a25e9a3edb1..a2d91f96f1a 100644
--- a/test/integration/Makefile
+++ b/test/integration/Makefile
@@ -6,7 +6,7 @@ ifndef CLOUD_RESOURCE_PREFIX
 CLOUD_RESOURCE_PREFIX := $(shell python -c "import string,random; print('ansible-testing-' + ''.join(random.choice(string.ascii_letters + string.digits) for _ in range(8)));")
 endif
 
-CREDENTIALS_FILE = credentials.yml
+CREDENTIALS_FILE ?= credentials.yml
 # If credentials.yml exists, use it
 ifneq ("$(wildcard $(CREDENTIALS_FILE))","")
 CREDENTIALS_ARG = -e @$(CREDENTIALS_FILE)