diff --git a/.chronus/changes/http-specs_fix-api-key-mockapi-2024-10-25-15-53-24.md b/.chronus/changes/http-specs_fix-api-key-mockapi-2024-10-25-15-53-24.md
new file mode 100644
index 0000000000..37290d5adc
--- /dev/null
+++ b/.chronus/changes/http-specs_fix-api-key-mockapi-2024-10-25-15-53-24.md
@@ -0,0 +1,7 @@
+---
+changeKind: fix
+packages:
+  - "@typespec/http-specs"
+---
+
+Fix api-key mockapi
\ No newline at end of file
diff --git a/packages/http-specs/specs/authentication/api-key/mockapi.ts b/packages/http-specs/specs/authentication/api-key/mockapi.ts
index 34cc3972ee..db82b7319c 100644
--- a/packages/http-specs/specs/authentication/api-key/mockapi.ts
+++ b/packages/http-specs/specs/authentication/api-key/mockapi.ts
@@ -7,7 +7,7 @@ Scenarios.Authentication_ApiKey_invalid = passOnCode(403, {
   method: `get`,
   request: {
     headers: {
-      "x-ms-api-key": "valid-key",
+      "x-ms-api-key": "invalid-key",
     },
     status: 403,
   },