diff --git a/src/agents/model-fallback.probe.test.ts b/src/agents/model-fallback.probe.test.ts
index 4db399376ea..bead0ac19c9 100644
--- a/src/agents/model-fallback.probe.test.ts
+++ b/src/agents/model-fallback.probe.test.ts
@@ -27,6 +27,10 @@ vi.mock("./auth-profiles/order.js", () => ({
   resolveAuthProfileOrder: vi.fn(),
 }));
 
+vi.mock("./provider-model-normalization.runtime.js", () => ({
+  normalizeProviderModelIdWithRuntime: () => undefined,
+}));
+
 vi.mock("./auth-profiles/source-check.js", () => ({
   hasAnyAuthProfileStoreSource: vi.fn(() => true),
 }));
diff --git a/src/agents/model-fallback.test.ts b/src/agents/model-fallback.test.ts
index 074ef5cde1b..1148cbb3fb3 100644
--- a/src/agents/model-fallback.test.ts
+++ b/src/agents/model-fallback.test.ts
@@ -32,6 +32,10 @@ vi.mock("../plugins/provider-runtime.js", () => ({
   resolveExternalAuthProfilesWithPlugins: () => [],
 }));
 
+vi.mock("./provider-model-normalization.runtime.js", () => ({
+  normalizeProviderModelIdWithRuntime: () => undefined,
+}));
+
 const authSourceCheckMock = vi.hoisted(() => ({
   hasAnyAuthProfileStoreSource: vi.fn(() => false),
 }));