diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0ae23df..5c6e40f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,6 +29,11 @@ jobs:
 
     - name: Install the project
       run: uv sync --all-extras --dev
+    
+    - name: Install dependencies
+  run: |
+    uv pip install -e ".[test]"  # Note the added test extra
+    uv pip install pytest pytest-cov pytest-mock
 
     - name: Unit tests
       env:
diff --git a/pyproject.toml b/pyproject.toml
index 98d1feb..f42e118 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -56,6 +56,10 @@ dependencies = [
 [project.scripts]
 gaspar = "gaspar.cli.main:main"
 
+[tool.setuptools.package-dir]
+gaspar = "src/gaspar"
+tests = "tests"
+
 [tool.pytest.ini_options]
 minversion = "6.0"
 addopts = "--strict-markers --doctest-modules --doctest-glob='*.rst' --ignore=setup.py"
diff --git a/setup.cfg b/setup.cfg
index b53dc8e..989485c 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -43,4 +43,10 @@ console_scripts =
 gaspar =
     examples/*.yaml
     examples/*.py
-    examples/documents/*.txt
\ No newline at end of file
+    examples/documents/*.txt
+
+[options.extras_require]
+test =
+    pytest >=7.0
+    pytest-cov >=4.0
+    pytest-mock >=3.0
\ No newline at end of file