diff --git a/test/infinicore/run_with_external_test_cases.py b/test/infinicore/run_with_external_test_cases.py
new file mode 100644
index 000000000..dfedac4e0
--- /dev/null
+++ b/test/infinicore/run_with_external_test_cases.py
@@ -0,0 +1,110 @@
+import sys
+import os
+import importlib
+import inspect
+import infinicore
+
+# Adapt path to ensure framework can be referenced
+current_dir = os.path.dirname(os.path.abspath(__file__))
+if current_dir not in sys.path:
+    sys.path.append(current_dir)
+
+from framework.base import BaseOperatorTest, TestCase, TensorSpec
+from framework.runner import GenericTestRunner
+
+# -------------------------------------------------------
+# Core Utility Methods
+# -------------------------------------------------------
+def run_case_with_generic_runner(op_name, test_cases_input):
+    """
+    Reuse GenericTestRunner to run externally injected test cases.
+    Supports both single TestCase object and list of TestCase objects.
+    """
+    
+    # 1. Input Normalization: Ensure we always work with a list
+    if isinstance(test_cases_input, list):
+        cases_to_run = test_cases_input
+    else:
+        cases_to_run = [test_cases_input]
+
+    # 2. Dynamically import target operator module (e.g., ops.add)
+    module_path = f"ops.{op_name}"
+    try:
+        module = importlib.import_module(module_path)
+    except ImportError:
+        print(f"❌ Module not found: {module_path}")
+        return
+
+    # 3. Find the original OpTest class
+    OriginalOpTest = None
+    for name, obj in inspect.getmembers(module, inspect.isclass):
+        if issubclass(obj, BaseOperatorTest) and obj is not BaseOperatorTest:
+            OriginalOpTest = obj
+            break
+    
+    if not OriginalOpTest:
+        print("❌ OpTest class not found")
+        return
+
+    # 4. Dynamically define a subclass (Proxy Class)
+    class ProxyOpTest(OriginalOpTest):
+        def __init__(self):
+            super().__init__() 
+
+        def get_test_cases(self):
+            # 🔥 Core: Return the list we prepared externally
+            return cases_to_run
+
+    print(f"🚀 Running {len(cases_to_run)} externally injected Case(s) for '{op_name}'...")
+    
+    # 5. Pass this proxy class to the Runner and run test
+    runner = GenericTestRunner(ProxyOpTest)
+    
+    # Wrap in try-except because run_and_exit usually calls sys.exit()
+    try:
+        runner.run_and_exit()
+    except SystemExit:
+        pass
+
+
+# -------------------------------------------------------
+# Usage Example
+# -------------------------------------------------------
+if __name__ == "__main__":
+
+    # Define common specs
+    dtype = infinicore.float32
+    
+    # Case 1: Small Shape
+    spec_small = TensorSpec.from_tensor((2, 4), None, dtype)
+    case_1 = TestCase(
+        inputs=[spec_small, spec_small],
+        kwargs={},
+        output_spec=None,
+        comparison_target=None,
+        tolerance={"atol": 1e-5, "rtol": 1e-3},
+        description="Custom Small Case"
+    )
+
+    # Case 2: Large Shape
+    spec_large = TensorSpec.from_tensor((16, 16), None, dtype)
+    case_2 = TestCase(
+        inputs=[spec_large, spec_large],
+        kwargs={},
+        output_spec=None,
+        comparison_target=None,
+        tolerance={"atol": 1e-5, "rtol": 1e-3},
+        description="Custom Large Case"
+    )
+
+    # -------------------------------------------------------
+    # Scenario A: Run a single case
+    # -------------------------------------------------------
+    print("\n--- Scenario A: Single Case ---")
+    run_case_with_generic_runner("add", case_1)
+
+    # -------------------------------------------------------
+    # Scenario B: Run multiple cases
+    # -------------------------------------------------------
+    print("\n--- Scenario B: Multiple Cases List ---")
+    run_case_with_generic_runner("add", [case_1, case_2])