diff --git a/.changeset/forty-brooms-fix.md b/.changeset/forty-brooms-fix.md
new file mode 100644
index 000000000..ff2d5e4f1
--- /dev/null
+++ b/.changeset/forty-brooms-fix.md
@@ -0,0 +1,5 @@
+---
+"@azure-tools/cadl-ranch-specs": minor
+---
+
+Fix some minor issues in the namespace of azure/client-generate-core/flatten-property.
diff --git a/.changeset/gold-horses-brake.md b/.changeset/gold-horses-brake.md
new file mode 100644
index 000000000..5b73acf9a
--- /dev/null
+++ b/.changeset/gold-horses-brake.md
@@ -0,0 +1,5 @@
+---
+"@azure-tools/cadl-ranch-expect": patch
+---
+
+fix(decorator): replace hard code url with `{endpoint}` in `@scenarioService`
diff --git a/packages/cadl-ranch-expect/src/decorators.ts b/packages/cadl-ranch-expect/src/decorators.ts
index b706467af..294285e53 100644
--- a/packages/cadl-ranch-expect/src/decorators.ts
+++ b/packages/cadl-ranch-expect/src/decorators.ts
@@ -238,6 +238,20 @@ export function $scenarioService(
     derivedModels: [],
     projectionsByName: [],
   } as any);
-  context.call($server, target, "http://localhost:3000", "TestServer endpoint");
+
+  context.call($server, target, "{endpoint}", "Test server endpoint", {
+    kind: "Model",
+    properties: new Map().set("endpoint", {
+      name: "endpoint",
+      type: context.program!.getGlobalNamespaceType().namespaces.get("TypeSpec")!.scalars.get("string"),
+      defaultValue: { entityKind: "Value", valueKind: "StringValue", value: "http://localhost:3000" },
+    }),
+    decorators: [],
+    projections: [],
+    name: "parameters",
+    derivedModels: [],
+    projectionsByName: [],
+  } as any);
+
   context.call($route, target, route);
 }
diff --git a/packages/cadl-ranch-specs/http/azure/client-generator-core/flatten-property/main.tsp b/packages/cadl-ranch-specs/http/azure/client-generator-core/flatten-property/main.tsp
index 35a7e82ee..e84aaa145 100644
--- a/packages/cadl-ranch-specs/http/azure/client-generator-core/flatten-property/main.tsp
+++ b/packages/cadl-ranch-specs/http/azure/client-generator-core/flatten-property/main.tsp
@@ -3,11 +3,11 @@ import "@azure-tools/cadl-ranch-expect";
 import "@azure-tools/typespec-client-generator-core";
 
 using TypeSpec.Http;
-using Azure.ClientGenerator.Core;
+using global.Azure.ClientGenerator.Core;
 
 @doc("Illustrates the model flatten cases.")
 @scenarioService("/azure/client-generator-core/flatten-property")
-namespace Azure.ClientGenerator.Core.FlattenProperty;
+namespace _Specs_.Azure.ClientGenerator.Core.FlattenProperty;
 
 @doc("This is the model with one level of flattening.")
 model FlattenModel {