diff --git a/ci/workflows/pull-request.yml b/ci/workflows/pull-request.yml
index c48de6df64f1c..298e209cb54c5 100644
--- a/ci/workflows/pull-request.yml
+++ b/ci/workflows/pull-request.yml
@@ -449,7 +449,7 @@ steps:
     retry: *auto-retry
 
   - label: "recovery test (deterministic simulation)"
-    command: "TEST_NUM=8 KILL_RATE=0.5 BACKGROUND_DDL_RATE=0.0 ci/scripts/deterministic-recovery-test.sh"
+    command: "TEST_NUM=5 KILL_RATE=0.5 BACKGROUND_DDL_RATE=0.0 ci/scripts/deterministic-recovery-test.sh"
     if: |
       !(build.pull_request.labels includes "ci/skip-ci") && build.env("CI_STEPS") == null
       || build.pull_request.labels includes "ci/run-recovery-test-deterministic-simulation"
@@ -468,7 +468,7 @@ steps:
       # - test-collector#v1.0.0:
       #     files: "*-junit.xml"
       #     format: "junit"
-    timeout_in_minutes: 25
+    timeout_in_minutes: 30
     cancel_on_build_failing: true
     retry: *auto-retry