diff --git a/tests/unit/cc-compatible-provider.test.ts b/tests/unit/cc-compatible-provider.test.ts
index def57d8c39..751e21e9f9 100644
--- a/tests/unit/cc-compatible-provider.test.ts
+++ b/tests/unit/cc-compatible-provider.test.ts
@@ -808,7 +808,12 @@ test("provider-nodes create route rejects CC mode when feature flag is disabled"
       headers: { "Content-Type": "application/json" },
       body: JSON.stringify({
         name: "Hidden CC",
-        prefix: "cc",
+        // #93da24cd7 reserved-prefix guard: "cc" is the built-in `claude`
+        // registry alias, so a compatible node created with it would never be
+        // reachable at runtime and is now rejected (400) at the write path.
+        // These cases are about the CC feature flag / dedicated id prefix, not
+        // about the operator-chosen prefix, so use a non-reserved one.
+        prefix: "cc-proxy",
         baseUrl: "https://proxy.example.com/v1",
         type: "anthropic-compatible",
         compatMode: "cc",
@@ -828,7 +833,12 @@ test("provider-nodes create route creates CC node with dedicated prefix when ena
       headers: { "Content-Type": "application/json" },
       body: JSON.stringify({
         name: "Hidden CC",
-        prefix: "cc",
+        // #93da24cd7 reserved-prefix guard: "cc" is the built-in `claude`
+        // registry alias, so a compatible node created with it would never be
+        // reachable at runtime and is now rejected (400) at the write path.
+        // These cases are about the CC feature flag / dedicated id prefix, not
+        // about the operator-chosen prefix, so use a non-reserved one.
+        prefix: "cc-proxy",
         baseUrl: "https://proxy.example.com/v1/messages?beta=true",
         type: "anthropic-compatible",
         compatMode: "cc",