diff --git a/webview-ui/src/utils/__tests__/sourceMapInitializer.spec.ts b/webview-ui/src/utils/__tests__/sourceMapInitializer.spec.ts
new file mode 100644
index 00000000000..bd7b700fde8
--- /dev/null
+++ b/webview-ui/src/utils/__tests__/sourceMapInitializer.spec.ts
@@ -0,0 +1,82 @@
+import { exposeSourceMapsForDebugging } from "../sourceMapInitializer"
+
+describe("sourceMapInitializer", () => {
+	describe("exposeSourceMapsForDebugging", () => {
+		let originalNodeEnv: string | undefined
+
+		beforeEach(() => {
+			originalNodeEnv = process.env.NODE_ENV
+			// Clear any existing debugging functions
+			delete (window as any).__testSourceMaps
+			delete (window as any).__applySourceMaps
+			delete (window as any).__checkSourceMap
+		})
+
+		afterEach(() => {
+			process.env.NODE_ENV = originalNodeEnv
+			// Clean up any debugging functions
+			delete (window as any).__testSourceMaps
+			delete (window as any).__applySourceMaps
+			delete (window as any).__checkSourceMap
+		})
+
+		it("should not expose debugging functions in production mode", () => {
+			// Set production mode
+			process.env.NODE_ENV = "production"
+
+			// Call the function
+			exposeSourceMapsForDebugging()
+
+			// Verify that debugging functions are NOT exposed
+			expect((window as any).__testSourceMaps).toBeUndefined()
+			expect((window as any).__applySourceMaps).toBeUndefined()
+			expect((window as any).__checkSourceMap).toBeUndefined()
+		})
+
+		it("should expose debugging functions in development mode", () => {
+			// Set development mode
+			process.env.NODE_ENV = "development"
+
+			// Call the function
+			exposeSourceMapsForDebugging()
+
+			// Verify that debugging functions ARE exposed
+			expect((window as any).__testSourceMaps).toBeDefined()
+			expect((window as any).__applySourceMaps).toBeDefined()
+			expect((window as any).__checkSourceMap).toBeDefined()
+			expect(typeof (window as any).__testSourceMaps).toBe("function")
+			expect(typeof (window as any).__applySourceMaps).toBe("function")
+			expect(typeof (window as any).__checkSourceMap).toBe("function")
+		})
+
+		it("should expose debugging functions in test mode", () => {
+			// Set test mode
+			process.env.NODE_ENV = "test"
+
+			// Call the function
+			exposeSourceMapsForDebugging()
+
+			// Verify that debugging functions ARE exposed
+			expect((window as any).__testSourceMaps).toBeDefined()
+			expect((window as any).__applySourceMaps).toBeDefined()
+			expect((window as any).__checkSourceMap).toBeDefined()
+		})
+
+		it("should not throw errors when called multiple times in production", () => {
+			// Set production mode
+			process.env.NODE_ENV = "production"
+
+			// Should not throw when called multiple times
+			expect(() => {
+				exposeSourceMapsForDebugging()
+				exposeSourceMapsForDebugging()
+				exposeSourceMapsForDebugging()
+			}).not.toThrow()
+
+			// Functions should still not be exposed
+			expect((window as any).__testSourceMaps).toBeUndefined()
+			expect((window as any).__applySourceMaps).toBeUndefined()
+			expect((window as any).__checkSourceMap).toBeUndefined()
+		})
+	})
+})
diff --git a/webview-ui/src/utils/sourceMapInitializer.ts b/webview-ui/src/utils/sourceMapInitializer.ts
index 57fde0156c8..41798402dfa 100644
--- a/webview-ui/src/utils/sourceMapInitializer.ts
+++ b/webview-ui/src/utils/sourceMapInitializer.ts
@@ -113,7 +113,7 @@ export function initializeSourceMaps(): void {
  * Expose source maps on the window object for debugging
  */
 export function exposeSourceMapsForDebugging(): void {
-	if (process.env.NODE_ENV !== "production") {
+	if (process.env.NODE_ENV === "production") {
 		return
 	}