diff --git a/src/Umbraco.Web.UI.Client/src/libs/extension-api/controller/base-extension-initializer.controller.test.ts b/src/Umbraco.Web.UI.Client/src/libs/extension-api/controller/base-extension-initializer.controller.test.ts
index c77ea406f6..7e2cd2e860 100644
--- a/src/Umbraco.Web.UI.Client/src/libs/extension-api/controller/base-extension-initializer.controller.test.ts
+++ b/src/Umbraco.Web.UI.Client/src/libs/extension-api/controller/base-extension-initializer.controller.test.ts
@@ -27,7 +27,7 @@ class UmbTestExtensionController extends UmbBaseExtensionInitializer {
 		alias: string,
 		onPermissionChanged: (isPermitted: boolean) => void
 	) {
-		super(host, extensionRegistry, 'test_', alias, onPermissionChanged);
+		super(host, extensionRegistry, 'test', alias, onPermissionChanged);
 		this._init();
 	}
 
diff --git a/src/Umbraco.Web.UI.Client/src/libs/extension-api/controller/base-extension-initializer.controller.ts b/src/Umbraco.Web.UI.Client/src/libs/extension-api/controller/base-extension-initializer.controller.ts
index cbdcd8053d..600f7c4b3f 100644
--- a/src/Umbraco.Web.UI.Client/src/libs/extension-api/controller/base-extension-initializer.controller.ts
+++ b/src/Umbraco.Web.UI.Client/src/libs/extension-api/controller/base-extension-initializer.controller.ts
@@ -55,7 +55,7 @@ export abstract class UmbBaseExtensionInitializer<
 		alias: string,
 		onPermissionChanged?: (isPermitted: boolean, controller: SubClassType) => void
 	) {
-		super(host, extensionTypeName+alias);
+		super(host, extensionTypeName + '_' + alias);
 		this.#extensionRegistry = extensionRegistry;
 		this.#alias = alias;
 		this.#onPermissionChanged = onPermissionChanged;