diff --git a/frontend/src/components/Chat.test.tsx b/frontend/src/components/Chat.test.tsx
index 87ce0c9..df43e32 100644
--- a/frontend/src/components/Chat.test.tsx
+++ b/frontend/src/components/Chat.test.tsx
@@ -675,8 +675,8 @@ describe("Chat message rendering — unified tool call UI", () => {
 		});
 
 		expect(await screen.findByText("I'll read that file.")).toBeInTheDocument();
-		// Tool call badge should appear showing the function name
-		expect(await screen.findByText(/Read/)).toBeInTheDocument();
+		// Tool call badge should appear showing the function name and first arg
+		expect(await screen.findByText("Read(src/main.rs)")).toBeInTheDocument();
 	});
 
 	it("renders collapsible tool output for tool role messages (AC3)", async () => {
@@ -766,7 +766,7 @@ describe("Chat message rendering — unified tool call UI", () => {
 			capturedWsHandlers?.onUpdate(messages);
 		});
 
-		expect(await screen.findByText(/Bash/)).toBeInTheDocument();
-		expect(await screen.findByText(/Read/)).toBeInTheDocument();
+		expect(await screen.findByText("Bash(cargo test)")).toBeInTheDocument();
+		expect(await screen.findByText("Read(Cargo.toml)")).toBeInTheDocument();
 	});
 });