diff --git a/src/Runner.Worker/Handlers/ContainerActionHandler.cs b/src/Runner.Worker/Handlers/ContainerActionHandler.cs
index 775ce2f0428..3ab6a7586ae 100644
--- a/src/Runner.Worker/Handlers/ContainerActionHandler.cs
+++ b/src/Runner.Worker/Handlers/ContainerActionHandler.cs
@@ -219,7 +219,13 @@ public async Task RunAsync(ActionRunStage stage)
             var systemConnection = ExecutionContext.Global.Endpoints.Single(x => string.Equals(x.Name, WellKnownServiceEndpointNames.SystemVssConnection, StringComparison.OrdinalIgnoreCase));
             Environment["ACTIONS_RUNTIME_URL"] = systemConnection.Url.AbsoluteUri;
             Environment["ACTIONS_RUNTIME_TOKEN"] = systemConnection.Authorization.Parameters[EndpointAuthorizationParameters.AccessToken];
-            if (systemConnection.Data.TryGetValue("CacheServerUrl", out var cacheUrl) && !string.IsNullOrEmpty(cacheUrl))
+
+            string customCacheUrl = System.Environment.GetEnvironmentVariable("CUSTOM_ACTIONS_CACHE_URL");
+            if (!string.IsNullOrEmpty(customCacheUrl))
+            {
+                Environment["ACTIONS_CACHE_URL"] = customCacheUrl;
+            }
+            else if (systemConnection.Data.TryGetValue("CacheServerUrl", out var cacheUrl) && !string.IsNullOrEmpty(cacheUrl))
             {
                 Environment["ACTIONS_CACHE_URL"] = cacheUrl;
             }
diff --git a/src/Runner.Worker/Handlers/NodeScriptActionHandler.cs b/src/Runner.Worker/Handlers/NodeScriptActionHandler.cs
index 9d412a72314..ff4c89c8d52 100644
--- a/src/Runner.Worker/Handlers/NodeScriptActionHandler.cs
+++ b/src/Runner.Worker/Handlers/NodeScriptActionHandler.cs
@@ -54,7 +54,13 @@ public async Task RunAsync(ActionRunStage stage)
             var systemConnection = ExecutionContext.Global.Endpoints.Single(x => string.Equals(x.Name, WellKnownServiceEndpointNames.SystemVssConnection, StringComparison.OrdinalIgnoreCase));
             Environment["ACTIONS_RUNTIME_URL"] = systemConnection.Url.AbsoluteUri;
             Environment["ACTIONS_RUNTIME_TOKEN"] = systemConnection.Authorization.Parameters[EndpointAuthorizationParameters.AccessToken];
-            if (systemConnection.Data.TryGetValue("CacheServerUrl", out var cacheUrl) && !string.IsNullOrEmpty(cacheUrl))
+
+            string customCacheUrl = System.Environment.GetEnvironmentVariable("CUSTOM_ACTIONS_CACHE_URL");
+            if (!string.IsNullOrEmpty(customCacheUrl))
+            {
+                Environment["ACTIONS_CACHE_URL"] = customCacheUrl;
+            }
+            else if (systemConnection.Data.TryGetValue("CacheServerUrl", out var cacheUrl) && !string.IsNullOrEmpty(cacheUrl))
             {
                 Environment["ACTIONS_CACHE_URL"] = cacheUrl;
             }