diff --git a/src/services/mermaid/__tests__/google-generative-ai.d.ts b/src/services/mermaid/__tests__/google-generative-ai.d.ts
new file mode 100644
index 0000000000..466f8fe597
--- /dev/null
+++ b/src/services/mermaid/__tests__/google-generative-ai.d.ts
@@ -0,0 +1,5 @@
+// Mock type declarations for @google/generative-ai in tests
+declare module "@google/generative-ai" {
+	export const GoogleGenerativeAI: any
+	export const _mockGenerateContent: any
+}