diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index a8d822a..e511102 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -31,10 +31,10 @@ jobs:
         cache: pip
         cache-dependency-path: '**/pyproject.yaml'
 
-    - name: Install test dependencies
+    - name: Install dev dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install --use-deprecated=legacy-resolver -e .[dev]
+        pip install --use-deprecated=legacy-resolver '.[dev]'
 
     - name: Lint with Ruff
       run: |
@@ -70,7 +70,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        make develop
+        pip install --use-deprecated=legacy-resolver '.[tests]'
 
     - name: Test with pytest
       run: |
diff --git a/Makefile b/Makefile
index 8eef5d7..bbcce4d 100644
--- a/Makefile
+++ b/Makefile
@@ -49,7 +49,7 @@ ${VE_DIR}:
 #=> develop: install package in develop mode
 .PHONY: develop
 develop:
-	pip install -e ".[dev]"
+	pip install -e ".[dev,tests]"
 	pre-commit install
 
 #=> install: install package
diff --git a/pyproject.toml b/pyproject.toml
index 99c0a53..c51a749 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,13 +27,15 @@ dev = [
 	"ipython ~= 8.4",
 	"mypy-extensions ~= 1.0",
 	"pre-commit ~= 3.4",
-	"pytest-cov ~= 4.1",
-	"pytest-optional-tests",
-	"pytest ~= 7.1",
 	"pyright~=1.1",
 	"ruff == 0.4.4",
-	"tox ~= 4.15",
-	"vcrpy",
+]
+tests = [
+    "pytest-cov ~= 4.1",
+    "pytest-optional-tests",
+    "pytest ~= 7.1",
+    "vcrpy",
+    "tox ~= 4.15",
 ]
 docs = [
 	"mkdocs",