diff --git a/src/crestodian/probes.test.ts b/src/crestodian/probes.test.ts
index 8584b227aa8b..c8f92dad5394 100644
--- a/src/crestodian/probes.test.ts
+++ b/src/crestodian/probes.test.ts
@@ -6,6 +6,7 @@ import { probeGatewayUrl, probeLocalCommand } from "./probes.js";
 describe("crestodian probes", () => {
   afterEach(() => {
     vi.restoreAllMocks();
+    vi.unstubAllGlobals();
   });
 
   it("bounds noisy local command probe output", async () => {
@@ -54,4 +55,26 @@ describe("crestodian probes", () => {
 
     expect(timeoutSpy).toHaveBeenCalledWith(expect.any(Function), MAX_TIMER_TIMEOUT_MS);
   });
+
+  it("cancels gateway health response bodies", async () => {
+    const cancel = vi.fn(async () => undefined);
+    vi.stubGlobal(
+      "fetch",
+      vi.fn(
+        async () =>
+          ({
+            ok: false,
+            statusText: "Service Unavailable",
+            body: { cancel },
+          }) as unknown as Response,
+      ),
+    );
+
+    await expect(probeGatewayUrl("ws://127.0.0.1:1234")).resolves.toEqual({
+      reachable: false,
+      url: "ws://127.0.0.1:1234",
+      error: "Service Unavailable",
+    });
+    expect(cancel).toHaveBeenCalledTimes(1);
+  });
 });
diff --git a/src/crestodian/probes.ts b/src/crestodian/probes.ts
index e17d0839b82c..401e3f98c966 100644
--- a/src/crestodian/probes.ts
+++ b/src/crestodian/probes.ts
@@ -116,8 +116,9 @@ export async function probeGatewayUrl(
   const timeoutMs = resolveTimerTimeoutMs(opts.timeoutMs, 900);
   const controller = new AbortController();
   const timeout = setTimeout(() => controller.abort(), timeoutMs);
+  let response: Response | undefined;
   try {
-    const response = await fetch(healthUrl, {
+    response = await fetch(healthUrl, {
       method: "GET",
       signal: controller.signal,
     });
@@ -130,5 +131,6 @@ export async function probeGatewayUrl(
     };
   } finally {
     clearTimeout(timeout);
+    await response?.body?.cancel().catch(() => undefined);
   }
 }