diff --git a/src/plugin-sdk/browser-facades.test.ts b/src/plugin-sdk/browser-facades.test.ts
index 47906fe0718..faa834420ad 100644
--- a/src/plugin-sdk/browser-facades.test.ts
+++ b/src/plugin-sdk/browser-facades.test.ts
@@ -8,6 +8,8 @@ vi.mock("./facade-loader.js", () => ({
 
 describe("plugin-sdk browser facades", () => {
   beforeEach(() => {
+    // Facade wrappers cache successful loads; each case needs a clean wrapper module.
+    vi.resetModules();
     loadBundledPluginPublicSurfaceModuleSync.mockReset();
   });
 
diff --git a/src/plugin-sdk/browser-host-inspection.test.ts b/src/plugin-sdk/browser-host-inspection.test.ts
index 21f9593d351..114829c93e8 100644
--- a/src/plugin-sdk/browser-host-inspection.test.ts
+++ b/src/plugin-sdk/browser-host-inspection.test.ts
@@ -8,6 +8,8 @@ vi.mock("./facade-loader.js", () => ({
 
 describe("browser host inspection", () => {
   beforeEach(() => {
+    // Facade wrappers cache successful loads; each case needs a clean wrapper module.
+    vi.resetModules();
     loadBundledPluginPublicSurfaceModuleSync.mockReset();
   });