diff --git a/src/exec.test.ts b/src/exec.test.ts
index 1a1e9f7..32f4940 100644
--- a/src/exec.test.ts
+++ b/src/exec.test.ts
@@ -139,7 +139,7 @@ describe("runCommandArgs", () => {
     }
   });
 
-  it("returns after timeout even when descendants inherit stdio", async () => {
+  it("returns after timeout even when descendants inherit stdio", { timeout: 10_000 }, async () => {
     const dir = await mkdtemp(join(tmpdir(), "clawpatch-exec-timeout-"));
     const childScript = join(dir, "child.mjs");
     const parentScript = join(dir, "parent.mjs");
@@ -160,8 +160,9 @@ describe("runCommandArgs", () => {
     });
 
     expect(result.exitCode).toBe(124);
-    expect(result.durationMs).toBeLessThan(1500);
-    expect(Date.now() - started).toBeLessThan(1500);
+    // Allow shared-host scheduling headroom while still catching delayed pipe teardown.
+    expect(result.durationMs).toBeLessThan(5_000);
+    expect(Date.now() - started).toBeLessThan(5_000);
     expect(result.stderr).toContain("command timed out after 50ms");
   });
 
diff --git a/src/open-pr.test.ts b/src/open-pr.test.ts
index 95aacda..3501f49 100644
--- a/src/open-pr.test.ts
+++ b/src/open-pr.test.ts
@@ -8,8 +8,10 @@ import { statePaths, writePatchAttempt } from "./state.js";
 import { fixtureRoot, testOptions, writeFixture } from "./test-helpers.js";
 import type { PatchAttempt } from "./types.js";
 
-const HANG_TEST_TIMEOUT_MS = 4_000;
+const HANG_TEST_TIMEOUT_MS = 15_000;
 const SHORT_TIMEOUT_MS = 80;
+// Real git subprocesses need scheduling headroom on shared CI hosts.
+const RETURN_TIMEOUT_MS = 5_000;
 
 describe("open-pr command timeouts", () => {
   const previousEnv = {
@@ -67,7 +69,7 @@ describe("open-pr command timeouts", () => {
         code: "git-failure",
         message: expect.stringContaining(`timed out after ${SHORT_TIMEOUT_MS}ms`),
       });
-      expect(Date.now() - started).toBeLessThan(1_500);
+      expect(Date.now() - started).toBeLessThan(RETURN_TIMEOUT_MS);
     },
   );
 
@@ -90,7 +92,7 @@ describe("open-pr command timeouts", () => {
         code: "github-failure",
         message: expect.stringContaining(`timed out after ${SHORT_TIMEOUT_MS}ms`),
       });
-      expect(Date.now() - started).toBeLessThan(1_500);
+      expect(Date.now() - started).toBeLessThan(RETURN_TIMEOUT_MS);
     },
   );
 });