diff --git a/model/labels/regexp_test.go b/model/labels/regexp_test.go
index 48940ce252..3396b9da79 100644
--- a/model/labels/regexp_test.go
+++ b/model/labels/regexp_test.go
@@ -665,7 +665,7 @@ func TestAnalyzeRealQueries(t *testing.T) {
 		queryStartTimes []time.Time
 	}
 
-	labelValueRE := regexp.MustCompile(`=~\\"([^"]+)\\"`)
+	labelValueRE := regexp.MustCompile(`=~(?:\\"|')([^"']*)(?:\\"|')`)
 	tsRE := regexp.MustCompile(`ts=([^ ]+)`)
 	shardedQueriesRE := regexp.MustCompile(`sharded_queries=(\d+)`)
 	splitQueriesRE := regexp.MustCompile(`split_queries=(\d+)`)