diff --git a/query/query.go b/query/query.go
index a2a2d981744dc24c93922691c972fa0dba309ee6..41d18524ddfa98cc25970cd7c79f856ef3de077b 100644
--- a/query/query.go
+++ b/query/query.go
@@ -171,7 +171,7 @@ func postTraverse(g *SubGraph) (result map[uint64]interface{}, rerr error) {
 	r.Init(g.result, ro)
 
 	if q.UidsLength() != r.UidmatrixLength() {
-		glog.Fatal("Result uidmatrixlength: %v. Query uidslength: %v",
+		glog.Fatalf("Result uidmatrixlength: %v. Query uidslength: %v",
 			r.UidmatrixLength(), q.UidsLength())
 	}
 	if q.UidsLength() != r.ValuesLength() {
diff --git a/query/query_test.go b/query/query_test.go
index 136f171b9a2659f9c799d1155202b84411f1a62e..007047a439c3138e2ea152de6cde211cb1cde4cd 100644
--- a/query/query_test.go
+++ b/query/query_test.go
@@ -81,7 +81,7 @@ func checkSingleValue(t *testing.T, child *SubGraph,
 	}
 
 	if ul.UidsLength() != 0 {
-		t.Error("Expected uids length 0. Got: %v", ul.UidsLength())
+		t.Errorf("Expected uids length 0. Got: %v", ul.UidsLength())
 	}
 	checkName(t, r, 0, value)
 }