diff --git a/pkg/engine/image_verify_test.go b/pkg/engine/image_verify_test.go
index a529b01bb5..1d949b39a5 100644
--- a/pkg/engine/image_verify_test.go
+++ b/pkg/engine/image_verify_test.go
@@ -1118,7 +1118,7 @@ func Test_ImageVerifyCacheExpiredCosign(t *testing.T) {
 	opts := []imageverifycache.Option{
 		imageverifycache.WithCacheEnableFlag(true),
 		imageverifycache.WithMaxSize(1000),
-		imageverifycache.WithTTLDuration(5 * time.Second),
+		imageverifycache.WithTTLDuration(2 * time.Second),
 	}
 	imageVerifyCache, err := imageverifycache.New(opts...)
 	assert.NilError(t, err)
@@ -1137,7 +1137,7 @@ func Test_ImageVerifyCacheExpiredCosign(t *testing.T) {
 	er, ivm = testImageVerifyCache(imageVerifyCache, context.TODO(), registryclient.NewOrDie(), nil, policyContext, cfg)
 	secondOperationTime := time.Since(start)
 	errorAssertionUtil(t, image, ivm, er)
-	assert.Check(t, secondOperationTime > firstOperationTime/10 && secondOperationTime < firstOperationTime*10, "cache entry is expired, so image verification should not be from cache.")
+	assert.Check(t, secondOperationTime > firstOperationTime/10 && secondOperationTime < firstOperationTime*10, "cache entry is expired, so image verification should not be from cache.", firstOperationTime, secondOperationTime)
 }
 
 func Test_changePolicyCacheVerificationCosign(t *testing.T) {
@@ -1162,7 +1162,7 @@ func Test_changePolicyCacheVerificationCosign(t *testing.T) {
 	er, ivm = testImageVerifyCache(imageVerifyCache, context.TODO(), registryclient.NewOrDie(), nil, policyContext, cfg)
 	secondOperationTime := time.Since(start)
 	errorAssertionUtil(t, image, ivm, er)
-	assert.Check(t, secondOperationTime > firstOperationTime/10 && secondOperationTime < firstOperationTime*10, "cache entry not found, so image verification should not be from cache.")
+	assert.Check(t, secondOperationTime > firstOperationTime/10 && secondOperationTime < firstOperationTime*10, "cache entry not found, so image verification should not be from cache.", firstOperationTime, secondOperationTime)
 }
 
 var verifyImageNotaryPolicy = `{
@@ -1289,7 +1289,6 @@ var verifyImageNotaryResource = `{
 }`
 
 func Test_ImageVerifyCacheNotary(t *testing.T) {
-
 	opts := []imageverifycache.Option{
 		imageverifycache.WithCacheEnableFlag(true),
 		imageverifycache.WithMaxSize(1000),
@@ -1313,11 +1312,10 @@ func Test_ImageVerifyCacheNotary(t *testing.T) {
 }
 
 func Test_ImageVerifyCacheExpiredNotary(t *testing.T) {
-
 	opts := []imageverifycache.Option{
 		imageverifycache.WithCacheEnableFlag(true),
 		imageverifycache.WithMaxSize(1000),
-		imageverifycache.WithTTLDuration(5 * time.Second),
+		imageverifycache.WithTTLDuration(2 * time.Second),
 	}
 	imageVerifyCache, err := imageverifycache.New(opts...)
 	assert.NilError(t, err)
@@ -1325,19 +1323,18 @@ func Test_ImageVerifyCacheExpiredNotary(t *testing.T) {
 
 	policyContext := buildContext(t, verifyImageNotaryPolicy, verifyImageNotaryResource, "")
 
-	assert.NilError(t, err)
 	start := time.Now()
 	er, ivm := testImageVerifyCache(imageVerifyCache, context.TODO(), registryclient.NewOrDie(), nil, policyContext, cfg)
 	firstOperationTime := time.Since(start)
 	errorAssertionUtil(t, image, ivm, er)
+
 	time.Sleep(5 * time.Second)
 
 	start = time.Now()
 	er, ivm = testImageVerifyCache(imageVerifyCache, context.TODO(), registryclient.NewOrDie(), nil, policyContext, cfg)
 	secondOperationTime := time.Since(start)
 	errorAssertionUtil(t, image, ivm, er)
-	assert.Check(t, secondOperationTime > firstOperationTime/10 && secondOperationTime < firstOperationTime*10, "cache entry is expired, so image verification should not be from cache.")
-
+	assert.Check(t, secondOperationTime > firstOperationTime/10 && secondOperationTime < firstOperationTime*10, "cache entry is expired, so image verification should not be from cache.", firstOperationTime, secondOperationTime)
 }
 
 func Test_changePolicyCacheVerificationNotary(t *testing.T) {
@@ -1361,6 +1358,5 @@ func Test_changePolicyCacheVerificationNotary(t *testing.T) {
 	er, ivm = testImageVerifyCache(imageVerifyCache, context.TODO(), registryclient.NewOrDie(), nil, policyContext, cfg)
 	secondOperationTime := time.Since(start)
 	errorAssertionUtil(t, image, ivm, er)
-	assert.Check(t, secondOperationTime > firstOperationTime/10 && secondOperationTime < firstOperationTime*10, "cache entry not found, so image verification should not be from cache.")
-
+	assert.Check(t, secondOperationTime > firstOperationTime/10 && secondOperationTime < firstOperationTime*10, "cache entry not found, so image verification should not be from cache.", firstOperationTime, secondOperationTime)
 }