diff --git a/.github/workflows/pr_tests.yml b/.github/workflows/pr_tests.yml
index 50eef65f36..e83f542491 100644
--- a/.github/workflows/pr_tests.yml
+++ b/.github/workflows/pr_tests.yml
@@ -23,8 +23,8 @@ concurrency:
 env:
   DIFFUSERS_IS_CI: yes
   HF_XET_HIGH_PERFORMANCE: 1
-  OMP_NUM_THREADS: 2
-  MKL_NUM_THREADS: 2
+  OMP_NUM_THREADS: 4
+  MKL_NUM_THREADS: 4
   PYTEST_TIMEOUT: 60
 
 jobs: