diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index dfa106aa..8352293d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -29,7 +29,7 @@ concurrency:
 
 defaults:
   run:
-    shell: bash -l {0}
+    shell: bash -el {0}
 jobs:
   tests:
     name: ${{ matrix.os }}, Python ${{ matrix.python-version }}, ${{ matrix.conda-standalone }}
@@ -39,23 +39,23 @@ jobs:
       matrix:
         include:
           # UBUNTU
-          #- os: ubuntu-latest
-          #  python-version: "3.8"
-          #  conda-standalone: conda-standalone
-          #  check-docs: true
-          #- os: ubuntu-latest
-          #  python-version: "3.9"
-          #  conda-standalone: conda-standalone
-          #  check-docs: true
-          #- os: ubuntu-latest
-          #  python-version: "3.10"
-          #  conda-standalone: conda-standalone-nightly
-          #- os: ubuntu-latest
-          #  python-version: "3.11"
-          #  conda-standalone: micromamba
-          #- os: ubuntu-latest
-          #  python-version: "3.12"
-          #  conda-standalone: conda-standalone
+          - os: ubuntu-latest
+            python-version: "3.8"
+            conda-standalone: conda-standalone
+            check-docs: true
+          - os: ubuntu-latest
+            python-version: "3.9"
+            conda-standalone: conda-standalone
+            check-docs: true
+          - os: ubuntu-latest
+            python-version: "3.10"
+            conda-standalone: conda-standalone-nightly
+          - os: ubuntu-latest
+            python-version: "3.11"
+            conda-standalone: micromamba
+          - os: ubuntu-latest
+            python-version: "3.12"
+            conda-standalone: conda-standalone
           # MACOS
           - os: macos-13
             python-version: "3.8"
@@ -67,30 +67,30 @@ jobs:
           # - os: macos-13
           #   python-version: "3.10"
           #   conda-standalone: micromamba
-          #- os: macos-latest
-          #  python-version: "3.11"
-          #  conda-standalone: conda-standalone
-          #- os: macos-latest
-          #  python-version: "3.12"
-          #  conda-standalone: micromamba
-          ## WINDOWS
-          #- os: windows-latest
-          #  python-version: "3.8"
-          #  conda-standalone: conda-standalone
-          #- os: windows-latest
-          #  python-version: "3.9"
-          #  conda-standalone: conda-standalone-nightly
-          #- os: windows-latest
-          #  python-version: "3.10"
-          #  conda-standalone: conda-standalone
-          #- os: windows-latest
-          #  python-version: "3.11"
-          #  # conda-standalone: micromamba
-          #  conda-standalone: conda-standalone-nightly
-          #- os: windows-latest
-          #  python-version: "3.12"
-          #  # conda-standalone: micromamba
-          #  conda-standalone: conda-standalone
+          - os: macos-latest
+            python-version: "3.11"
+            conda-standalone: conda-standalone
+          - os: macos-latest
+            python-version: "3.12"
+            conda-standalone: micromamba
+          # WINDOWS
+          - os: windows-latest
+            python-version: "3.8"
+            conda-standalone: conda-standalone
+          - os: windows-latest
+            python-version: "3.9"
+            conda-standalone: conda-standalone-nightly
+          - os: windows-latest
+            python-version: "3.10"
+            conda-standalone: conda-standalone
+          - os: windows-latest
+            python-version: "3.11"
+            # conda-standalone: micromamba
+            conda-standalone: conda-standalone-nightly
+          - os: windows-latest
+            python-version: "3.12"
+            # conda-standalone: micromamba
+            conda-standalone: conda-standalone
 
     env:
       PYTHONUNBUFFERED: "1"
@@ -132,8 +132,6 @@ jobs:
             conda activate constructor-dev
             echo "CONSTRUCTOR_CONDA_EXE=$CONDA_PREFIX/standalone_conda/conda.exe" >> $GITHUB_ENV
           fi
-      - name: Setup tmate session
-        uses: mxschmitt/action-tmate@v3
       - name: Run unit tests
         run: |
           pytest -vv --cov=constructor --cov-branch tests/ -m "not examples"
diff --git a/tests/conftest.py b/tests/conftest.py
index e3cece0c..169c21a6 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,3 +1,4 @@
+import os
 import subprocess
 from pathlib import Path
 
@@ -19,12 +20,13 @@ def self_signed_application_certificate_macos(tmp_path):
     notarization_identity = "testapplication"
     notarization_identity_password = "5678"
     keychain_password = "abcd"
-    env = {
+    env = os.environ.copy()
+    env.update({
         "APPLICATION_SIGNING_ID": notarization_identity,
         "APPLICATION_SIGNING_PASSWORD": notarization_identity_password,
         "KEYCHAIN_PASSWORD": keychain_password,
         "ROOT_DIR": str(cert_root),
-    }
+    })
     p = subprocess.run(
         ["bash", REPO_DIR / "scripts" / "create_self_signed_certificates_macos.sh"],
         env=env,