diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 235959286..be0535fd9 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -19,6 +19,12 @@ permissions:
 jobs:
   build:
     runs-on: ${{ matrix.os }}
+    env:
+      OMP_NUM_THREADS: "1"
+      OPENBLAS_NUM_THREADS: "1"
+      MKL_NUM_THREADS: "1"
+      NUMEXPR_NUM_THREADS: "1"
+      VECLIB_MAXIMUM_THREADS: "1"
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest]
@@ -46,4 +52,4 @@ jobs:
     - name: Run optional tests
       if: ${{ matrix.python-version != '3.10' && matrix.python-version != '3.13' }}
       run: |
-        hatch run test-mitiq:test
\ No newline at end of file
+        hatch run test-mitiq:test