diff --git a/.github/workflows/ci_install-pkg.yml b/.github/workflows/ci_install-pkg.yml
index 30550c2..d7121c7 100644
--- a/.github/workflows/ci_install-pkg.yml
+++ b/.github/workflows/ci_install-pkg.yml
@@ -29,7 +29,7 @@ jobs:
 
       - name: Verify package
         run: |
-          pip install twine==3.2
+          pip install -r tests/requirements.txt
           twine check dist/*
           python setup.py clean
 
diff --git a/tests/requirements.txt b/tests/requirements.txt
index 5c70084..0315411 100644
--- a/tests/requirements.txt
+++ b/tests/requirements.txt
@@ -1,11 +1,9 @@
-pytest>6.0
-pytest-cov>2.10
-scikit-learn>=0.17
-phmdoctest>1.0
+pytest >6.0
+pytest-cov >2.10
+scikit-learn >=0.17
+phmdoctest >1.0
 dataclasses  # needed for phmdoctest
 
-flake8
 check-manifest
-twine>=3.2
-isort>=5.0
-mypy>=0.790
+twine >=3.2
+mypy >=1.0