diff --git a/src/infra/runtime-status.test.ts b/src/infra/runtime-status.test.ts
index fc79afe5bee..fec5c68e67b 100644
--- a/src/infra/runtime-status.test.ts
+++ b/src/infra/runtime-status.test.ts
@@ -4,6 +4,7 @@ import { formatRuntimeStatusWithDetails } from "./runtime-status.js";
 describe("formatRuntimeStatusWithDetails", () => {
   it("falls back to unknown when status is missing", () => {
     expect(formatRuntimeStatusWithDetails({})).toBe("unknown");
+    expect(formatRuntimeStatusWithDetails({ status: "   " })).toBe("unknown");
   });
 
   it("includes pid, distinct state, and non-empty details", () => {
@@ -26,5 +27,12 @@ describe("formatRuntimeStatusWithDetails", () => {
         details: [],
       }),
     ).toBe("running");
+    expect(
+      formatRuntimeStatusWithDetails({
+        status: " RUNNING ",
+        state: "running",
+        details: [],
+      }),
+    ).toBe("RUNNING");
   });
 });
diff --git a/src/infra/runtime-status.ts b/src/infra/runtime-status.ts
index 110a81084ff..4f0cfe2ef1d 100644
--- a/src/infra/runtime-status.ts
+++ b/src/infra/runtime-status.ts
@@ -11,12 +11,12 @@ export function formatRuntimeStatusWithDetails({
   state,
   details = [],
 }: RuntimeStatusFormatInput): string {
-  const runtimeStatus = status ?? "unknown";
+  const runtimeStatus = status?.trim() || "unknown";
   const fullDetails: string[] = [];
   if (pid) {
     fullDetails.push(`pid ${pid}`);
   }
-  if (state && state.toLowerCase() !== runtimeStatus) {
+  if (state && state.toLowerCase() !== runtimeStatus.toLowerCase()) {
     fullDetails.push(`state ${state}`);
   }
   for (const detail of details) {