diff --git a/.github/workflows/e2e.yml b/.github/workflows/e2e.yml
index 4e5f5a70e1b..68ae1ac101f 100644
--- a/.github/workflows/e2e.yml
+++ b/.github/workflows/e2e.yml
@@ -220,6 +220,15 @@ jobs:
           # self-hosted runners from pressure-flake unhandled errors.
           RUNNER_ENVIRONMENT: '${{ runner.environment }}'
         run: |-
+          export TMPDIR="${RUNNER_TEMP:-${TMPDIR:-/tmp}}"
+          if [ "${RUNNER_OS:-}" = "Linux" ]; then
+            QWEN_CI_TMPDIR="$(mktemp -d /var/tmp/qwen-ci-XXXXXX 2>/dev/null || true)"
+            if [ -n "$QWEN_CI_TMPDIR" ]; then
+              TMPDIR="$QWEN_CI_TMPDIR"
+              export TMPDIR
+              trap 'rm -rf "$TMPDIR" 2>/dev/null || true' EXIT
+            fi
+          fi
           # The docker leg runs vitest directly instead of through
           # test:integration:sandbox:docker: that script would rebuild the image
           # the step above just built.
diff --git a/scripts/tests/e2e-workflow.test.js b/scripts/tests/e2e-workflow.test.js
index 60ea5614b54..c8838dc4325 100644
--- a/scripts/tests/e2e-workflow.test.js
+++ b/scripts/tests/e2e-workflow.test.js
@@ -86,4 +86,12 @@ describe('e2e workflow', () => {
       expect(retryStep.env.VERBOSE).toBe('true');
     });
   });
+
+  it('routes Linux E2E scratch files away from /tmp', () => {
+    const runStep = yml.jobs['e2e-test-linux'].steps.find(
+      (step) => step.name === 'Run E2E tests',
+    );
+    expect(runStep.run).toContain('mktemp -d /var/tmp/qwen-ci-XXXXXX');
+    expect(runStep.run).toContain('trap \'rm -rf "$TMPDIR"');
+  });
 });