diff --git a/lib/otelmiddleware/headers.go b/lib/otelmiddleware/headers.go
index 508ba3d..d07d25b 100644
--- a/lib/otelmiddleware/headers.go
+++ b/lib/otelmiddleware/headers.go
@@ -31,7 +31,7 @@ func TraceIDWithGCPURLs(gcpProjectID string) func(next http.Handler) http.Handle
 			if traceID != "" {
 				res.Header().Set(headerKeyID, traceID)
 				res.Header().Set(headerKeyURL, getGCPTraceURL(gcpProjectID, traceID))
-				res.Header().Set(headerKeyLogsURL, getGCPTraceLogsURL(gcpProjectID, traceID, time.Now()))
+				res.Header().Set(headerKeyLogsURL, GetGCPTraceLogsURL(gcpProjectID, traceID, time.Now()))
 			}
 
 			next.ServeHTTP(res, req)
diff --git a/lib/otelmiddleware/util.go b/lib/otelmiddleware/util.go
index d28b3a2..b4bb5ee 100644
--- a/lib/otelmiddleware/util.go
+++ b/lib/otelmiddleware/util.go
@@ -36,7 +36,7 @@ func getGCPTraceURL(gcpProjectID, traceID string) string {
 	return fmt.Sprintf("%s/traces/list?%s", gcpBaseURL, params.Encode())
 }
 
-func getGCPTraceLogsURL(gcpProjectID, traceID string, refTime time.Time) string {
+func GetGCPTraceLogsURL(gcpProjectID, traceID string, refTime time.Time) string {
 	tracePath := getGCPTracePath(gcpProjectID, traceID)
 	query := fmt.Sprintf("(trace=\"%s\" OR labels.\"appengine.googleapis.com/trace_id\"=\"%s\")", tracePath, traceID)
 	timeRange := fmt.Sprintf("%s/%s--PT15M", refTime.Format(time.RFC3339), refTime.Format(time.RFC3339))