diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index d1cda47..0f5cb7b 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -166,7 +166,7 @@ performance_tests_dev:
     - pip install requests Pillow prettytable pyLibravatar dnspython py3dns
   script:
     - echo "Running performance tests against dev.libravatar.org..."
-    - python3 scripts/performance_tests.py --base-url $DEV_URL --concurrent-users 5 --avatar-threshold 2500 --response-threshold 2500 --p95-threshold 5000 --output performance_dev.json
+    - python3 scripts/performance_tests.py --base-url $DEV_URL --concurrent-users 5 --avatar-threshold 2500 --response-threshold 2500 --p95-threshold 5000 --ignore-cache-warnings --output performance_dev.json
   artifacts:
     paths:
       - performance_dev.json
diff --git a/scripts/performance_tests.py b/scripts/performance_tests.py
index cab52aa..0f14696 100644
--- a/scripts/performance_tests.py
+++ b/scripts/performance_tests.py
@@ -831,7 +831,7 @@ class PerformanceTestRunner:
 
         return first_duration, second_duration
 
-    def run_all_tests(self, avatar_threshold: int = 1000, response_threshold: int = 1000, p95_threshold: int = 2000) -> Optional[Dict[str, Any]]:
+    def run_all_tests(self, avatar_threshold: int = 1000, response_threshold: int = 1000, p95_threshold: int = 2000, ignore_cache_warnings: bool = False) -> Optional[Dict[str, Any]]:
         """Run all performance tests"""
         print("Starting Libravatar Performance Tests")
         print("=" * 50)
@@ -865,7 +865,7 @@ class PerformanceTestRunner:
             print(f"Performance tests completed in {total_duration:.2f}s")
 
             # Overall assessment
-            self.assess_overall_performance(avatar_threshold, response_threshold, p95_threshold)
+            self.assess_overall_performance(avatar_threshold, response_threshold, p95_threshold, ignore_cache_warnings)
 
             return self.results
 
@@ -928,7 +928,7 @@ class PerformanceTestRunner:
             "success_rate": len(successful_results) / len(results) if results else 0,
         }
 
-    def assess_overall_performance(self, avatar_threshold: int = 1000, response_threshold: int = 1000, p95_threshold: int = 2000) -> bool:
+    def assess_overall_performance(self, avatar_threshold: int = 1000, response_threshold: int = 1000, p95_threshold: int = 2000, ignore_cache_warnings: bool = False) -> bool:
         """Provide overall performance assessment"""
         print("\n=== OVERALL PERFORMANCE ASSESSMENT ===")
 
@@ -947,7 +947,7 @@ class PerformanceTestRunner:
                 warnings.append(f"{failed} requests failed under concurrent load")
 
         # Check cache performance
-        if "cache_performance" in self.results:
+        if "cache_performance" in self.results and not ignore_cache_warnings:
             cache_working = self.results["cache_performance"].get(
                 "cache_working", False
             )
@@ -1018,6 +1018,11 @@ def main() -> Optional[Dict[str, Any]]:
         default=2000,
         help="95th percentile threshold in ms (default: 2000ms, use 5000 for dev environments)",
     )
+    parser.add_argument(
+        "--ignore-cache-warnings",
+        action="store_true",
+        help="Don't fail on cache performance warnings (useful for dev environments)",
+    )
 
     args = parser.parse_args()
 
@@ -1034,7 +1039,7 @@ def main() -> Optional[Dict[str, Any]]:
         remote_testing=remote_testing,
     )
 
-    results = runner.run_all_tests(args.avatar_threshold, args.response_threshold, args.p95_threshold)
+    results = runner.run_all_tests(args.avatar_threshold, args.response_threshold, args.p95_threshold, args.ignore_cache_warnings)
 
     if args.output and results:
         import json