diff --git a/src/signal/daemon.test.ts b/src/signal/daemon.test.ts
deleted file mode 100644
index b83208654bf..00000000000
--- a/src/signal/daemon.test.ts
+++ /dev/null
@@ -1,25 +0,0 @@
-import { describe, expect, it } from "vitest";
-import { classifySignalCliLogLine } from "./daemon.js";
-
-describe("classifySignalCliLogLine", () => {
-  it("treats INFO/DEBUG as log (even if emitted on stderr)", () => {
-    expect(classifySignalCliLogLine("INFO  DaemonCommand - Started")).toBe("log");
-    expect(classifySignalCliLogLine("DEBUG Something")).toBe("log");
-  });
-
-  it("treats WARN/ERROR as error", () => {
-    expect(classifySignalCliLogLine("WARN  Something")).toBe("error");
-    expect(classifySignalCliLogLine("WARNING Something")).toBe("error");
-    expect(classifySignalCliLogLine("ERROR Something")).toBe("error");
-  });
-
-  it("treats failures without explicit severity as error", () => {
-    expect(classifySignalCliLogLine("Failed to initialize HTTP Server - oops")).toBe("error");
-    expect(classifySignalCliLogLine('Exception in thread "main"')).toBe("error");
-  });
-
-  it("returns null for empty lines", () => {
-    expect(classifySignalCliLogLine("")).toBe(null);
-    expect(classifySignalCliLogLine("   ")).toBe(null);
-  });
-});
diff --git a/src/signal/probe.test.ts b/src/signal/probe.test.ts
index 5b813b8599b..7250c1de744 100644
--- a/src/signal/probe.test.ts
+++ b/src/signal/probe.test.ts
@@ -1,4 +1,5 @@
 import { beforeEach, describe, expect, it, vi } from "vitest";
+import { classifySignalCliLogLine } from "./daemon.js";
 import { probeSignal } from "./probe.js";
 
 const signalCheckMock = vi.fn();
@@ -43,3 +44,26 @@ describe("probeSignal", () => {
     expect(res.version).toBe(null);
   });
 });
+
+describe("classifySignalCliLogLine", () => {
+  it("treats INFO/DEBUG as log (even if emitted on stderr)", () => {
+    expect(classifySignalCliLogLine("INFO  DaemonCommand - Started")).toBe("log");
+    expect(classifySignalCliLogLine("DEBUG Something")).toBe("log");
+  });
+
+  it("treats WARN/ERROR as error", () => {
+    expect(classifySignalCliLogLine("WARN  Something")).toBe("error");
+    expect(classifySignalCliLogLine("WARNING Something")).toBe("error");
+    expect(classifySignalCliLogLine("ERROR Something")).toBe("error");
+  });
+
+  it("treats failures without explicit severity as error", () => {
+    expect(classifySignalCliLogLine("Failed to initialize HTTP Server - oops")).toBe("error");
+    expect(classifySignalCliLogLine('Exception in thread "main"')).toBe("error");
+  });
+
+  it("returns null for empty lines", () => {
+    expect(classifySignalCliLogLine("")).toBe(null);
+    expect(classifySignalCliLogLine("   ")).toBe(null);
+  });
+});