diff --git a/src/infra/map-size.test.ts b/src/infra/map-size.test.ts
new file mode 100644
index 00000000000..82fbe8a52ac
--- /dev/null
+++ b/src/infra/map-size.test.ts
@@ -0,0 +1,39 @@
+import { describe, expect, it } from "vitest";
+import { pruneMapToMaxSize } from "./map-size.js";
+
+describe("pruneMapToMaxSize", () => {
+  it("keeps the newest entries after flooring fractional limits", () => {
+    const map = new Map([
+      ["a", 1],
+      ["b", 2],
+      ["c", 3],
+    ]);
+
+    pruneMapToMaxSize(map, 2.9);
+
+    expect([...map.entries()]).toEqual([
+      ["b", 2],
+      ["c", 3],
+    ]);
+  });
+
+  it("clears maps for zero or negative limits and leaves undersized maps untouched", () => {
+    const cleared = new Map([
+      ["a", 1],
+      ["b", 2],
+    ]);
+    pruneMapToMaxSize(cleared, 0);
+    expect([...cleared.entries()]).toEqual([]);
+
+    const alsoCleared = new Map([
+      ["a", 1],
+      ["b", 2],
+    ]);
+    pruneMapToMaxSize(alsoCleared, -4);
+    expect([...alsoCleared.entries()]).toEqual([]);
+
+    const unchanged = new Map([["a", 1]]);
+    pruneMapToMaxSize(unchanged, 5);
+    expect([...unchanged.entries()]).toEqual([["a", 1]]);
+  });
+});
diff --git a/src/infra/ports.test.ts b/src/infra/ports.test.ts
index f809662f1ac..9059d5e0c0f 100644
--- a/src/infra/ports.test.ts
+++ b/src/infra/ports.test.ts
@@ -7,6 +7,7 @@ const runCommandWithTimeoutMock = vi.hoisted(() => vi.fn());
 vi.mock("../process/exec.js", () => ({
   runCommandWithTimeout: (...args: unknown[]) => runCommandWithTimeoutMock(...args),
 }));
+import { formatPortListener } from "./ports-format.js";
 import { inspectPortUsage } from "./ports-inspect.js";
 import {
   buildPortHints,
@@ -62,29 +63,75 @@ describe("ports helpers", () => {
     expect(messages.join("\n")).toContain("another OpenClaw instance is already running");
   });
 
-  it("classifies ssh and gateway listeners", () => {
-    expect(
-      classifyPortListener({ commandLine: "ssh -N -L 18789:127.0.0.1:18789 user@host" }, 18789),
-    ).toBe("ssh");
-    expect(
-      classifyPortListener(
-        {
-          commandLine: "node /Users/me/Projects/openclaw/dist/entry.js gateway",
-        },
-        18789,
-      ),
-    ).toBe("gateway");
+  it("classifies port listeners across gateway, ssh, and unknown cases", () => {
+    const cases = [
+      {
+        listener: { commandLine: "ssh -N -L 18789:127.0.0.1:18789 user@host" },
+        expected: "ssh",
+      },
+      {
+        listener: { command: "ssh" },
+        expected: "ssh",
+      },
+      {
+        listener: { commandLine: "node /Users/me/Projects/openclaw/dist/entry.js gateway" },
+        expected: "gateway",
+      },
+      {
+        listener: { commandLine: "python -m http.server 18789" },
+        expected: "unknown",
+      },
+    ] as const;
+
+    for (const testCase of cases) {
+      expect(
+        classifyPortListener(testCase.listener, 18789),
+        JSON.stringify(testCase.listener),
+      ).toBe(testCase.expected);
+    }
   });
 
-  it("formats port diagnostics with hints", () => {
-    const diagnostics = {
+  it("builds ordered hints for mixed listener kinds and multiple listeners", () => {
+    expect(
+      buildPortHints(
+        [
+          { commandLine: "node dist/index.js openclaw gateway" },
+          { commandLine: "ssh -N -L 18789:127.0.0.1:18789" },
+          { commandLine: "python -m http.server 18789" },
+        ],
+        18789,
+      ),
+    ).toEqual([
+      expect.stringContaining("Gateway already running locally."),
+      "SSH tunnel already bound to this port. Close the tunnel or use a different local port in -L.",
+      "Another process is listening on this port.",
+      expect.stringContaining("Multiple listeners detected"),
+    ]);
+    expect(buildPortHints([], 18789)).toEqual([]);
+  });
+
+  it("formats port listeners and diagnostics for free and busy ports", () => {
+    expect(formatPortListener({ command: "ssh", address: "127.0.0.1:18789" })).toBe(
+      "pid ?: ssh (127.0.0.1:18789)",
+    );
+
+    expect(
+      formatPortDiagnostics({
+        port: 18789,
+        status: "free",
+        listeners: [],
+        hints: [],
+      }),
+    ).toEqual(["Port 18789 is free."]);
+
+    const lines = formatPortDiagnostics({
       port: 18789,
-      status: "busy" as const,
-      listeners: [{ pid: 123, commandLine: "ssh -N -L 18789:127.0.0.1:18789" }],
+      status: "busy",
+      listeners: [{ pid: 123, user: "alice", commandLine: "ssh -N -L 18789:127.0.0.1:18789" }],
       hints: buildPortHints([{ pid: 123, commandLine: "ssh -N -L 18789:127.0.0.1:18789" }], 18789),
-    };
-    const lines = formatPortDiagnostics(diagnostics);
+    });
     expect(lines[0]).toContain("Port 18789 is already in use");
+    expect(lines).toContain("- pid 123 alice: ssh -N -L 18789:127.0.0.1:18789");
     expect(lines.some((line) => line.includes("SSH tunnel"))).toBe(true);
   });
 });