diff --git a/service/channel_affinity_usage_cache_test.go b/service/channel_affinity_usage_cache_test.go
index 876297b21c..d3f12dcd36 100644
--- a/service/channel_affinity_usage_cache_test.go
+++ b/service/channel_affinity_usage_cache_test.go
@@ -3,8 +3,8 @@ package service
 import (
 	"fmt"
 	"net/http/httptest"
+	"sync/atomic"
 	"testing"
-	"time"
 
 	"github.com/QuantumNous/new-api/relaykit/dto"
 	"github.com/QuantumNous/new-api/relaykit/types"
@@ -12,6 +12,14 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
+var channelAffinityTestSeq atomic.Int64
+
+func affinityTestKeys(t *testing.T) (string, string) {
+	t.Helper()
+	key := fmt.Sprintf("%s:%d", t.Name(), channelAffinityTestSeq.Add(1))
+	return key, key
+}
+
 func buildChannelAffinityStatsContextForTest(ruleName, usingGroup, keyFP string) *gin.Context {
 	rec := httptest.NewRecorder()
 	ctx, _ := gin.CreateTestContext(rec)
@@ -26,9 +34,8 @@ func buildChannelAffinityStatsContextForTest(ruleName, usingGroup, keyFP string)
 }
 
 func TestObserveChannelAffinityUsageCacheByRelayFormat_ClaudeMode(t *testing.T) {
-	ruleName := fmt.Sprintf("rule_%d", time.Now().UnixNano())
+	ruleName, keyFP := affinityTestKeys(t)
 	usingGroup := "default"
-	keyFP := fmt.Sprintf("fp_%d", time.Now().UnixNano())
 	ctx := buildChannelAffinityStatsContextForTest(ruleName, usingGroup, keyFP)
 
 	usage := &dto.Usage{
@@ -53,9 +60,8 @@ func TestObserveChannelAffinityUsageCacheByRelayFormat_ClaudeMode(t *testing.T)
 }
 
 func TestObserveChannelAffinityUsageCacheByRelayFormat_MixedMode(t *testing.T) {
-	ruleName := fmt.Sprintf("rule_%d", time.Now().UnixNano())
+	ruleName, keyFP := affinityTestKeys(t)
 	usingGroup := "default"
-	keyFP := fmt.Sprintf("fp_%d", time.Now().UnixNano())
 	ctx := buildChannelAffinityStatsContextForTest(ruleName, usingGroup, keyFP)
 
 	openAIUsage := &dto.Usage{
@@ -83,9 +89,8 @@ func TestObserveChannelAffinityUsageCacheByRelayFormat_MixedMode(t *testing.T) {
 }
 
 func TestObserveChannelAffinityUsageCacheByRelayFormat_UnsupportedModeKeepsEmpty(t *testing.T) {
-	ruleName := fmt.Sprintf("rule_%d", time.Now().UnixNano())
+	ruleName, keyFP := affinityTestKeys(t)
 	usingGroup := "default"
-	keyFP := fmt.Sprintf("fp_%d", time.Now().UnixNano())
 	ctx := buildChannelAffinityStatsContextForTest(ruleName, usingGroup, keyFP)
 
 	usage := &dto.Usage{