diff --git a/.pullapprove.yml b/.pullapprove.yml
index a7efacfe7..ce688e20e 100644
--- a/.pullapprove.yml
+++ b/.pullapprove.yml
@@ -2,7 +2,7 @@ version: 2
 
 requirements:
   signed_off_by:
-    required: true
+    required: false
 
 group_defaults:
   required: 2
diff --git a/Makefile b/Makefile
index b7624caac..b50d4411c 100644
--- a/Makefile
+++ b/Makefile
@@ -72,7 +72,7 @@ endif
 .gitvalidation:
 	@which git-validation > /dev/null 2>/dev/null || (echo "ERROR: git-validation not found. Consider 'make install.tools' target" && false)
 ifdef TRAVIS_COMMIT_RANGE
-	git-validation -q -run DCO,short-subject,dangling-whitespace
+	git-validation -q -run short-subject,dangling-whitespace
 else
 	git-validation -v -run DCO,short-subject,dangling-whitespace -range $(EPOCH_TEST_COMMIT)..HEAD
 endif