diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 468659806..edaa6555b 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -60,20 +60,20 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          # - ubuntu-22.04
+          - ubuntu-22.04
           - macos-13
         # NOTE: There's no pre-built `grpcio` wheel for Python 3.11 yet
         # https://github.com/grpc/grpc/issues/32454
         python-version:
-          # - "3.9"
+          - "3.9"
           - "3.10"
         is-pr:
           - ${{ github.event_name == 'pull_request' }}
-        # exclude:
-        #   # MacOS tests take a lot of time, so we will run them only on merge
-        #   # From https://github.com/orgs/community/discussions/26253
-        #   - is-pr: true
-        #     os: macos-13
+        exclude:
+          # MacOS tests take a lot of time, so we will run them only on merge
+          # From https://github.com/orgs/community/discussions/26253
+          - is-pr: true
+            os: macos-13
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
@@ -109,27 +109,27 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          # - ubuntu-22.04
+          - ubuntu-22.04
           - macos-13
         python-version:
-          # - "3.9"
+          - "3.9"
           - "3.10"
         tox-environment:
-          # - sklearn
-          # - xgboost
-          # - lightgbm
-          # - mlflow
+          - sklearn
+          - xgboost
+          - lightgbm
+          - mlflow
           - huggingface
-          # - alibi-explain
-          # - alibi-detect
-          # - catboost
+          - alibi-explain
+          - alibi-detect
+          - catboost
         is-pr:
           - ${{ github.event_name == 'pull_request' }}
-        # exclude:
-        #   # MacOS tests take a lot of time, so we will run them only on merge
-        #   # From https://github.com/orgs/community/discussions/26253
-        #   - is-pr: true
-        #     os: macos-13
+        exclude:
+          # MacOS tests take a lot of time, so we will run them only on merge
+          # From https://github.com/orgs/community/discussions/26253
+          - is-pr: true
+            os: macos-13
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
@@ -164,10 +164,10 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          # - ubuntu-22.04
+          - ubuntu-22.04
           - macos-13
         python-version:
-          # - "3.9"
+          - "3.9"
           - "3.10"
     runs-on: ${{ matrix.os }}
     steps: