Install with tests extra

.ci/build.sh

@@ -2,6 +2,5 @@
 
 set -e
 
-python3 -m coverage erase
 make clean
 make install-coverage

.ci/install.sh

@@ -24,14 +24,7 @@ sudo apt-get -qq install libfreetype6-dev liblcms2-dev libtiff-dev python3-tk\
 
 python3 -m pip install --upgrade pip
 python3 -m pip install --upgrade wheel
-python3 -m pip install coverage
-python3 -m pip install defusedxml
 python3 -m pip install ipython
-python3 -m pip install olefile
-python3 -m pip install -U pytest
-python3 -m pip install -U pytest-cov
-python3 -m pip install -U pytest-timeout
-python3 -m pip install pyroma
 # optional test dependencies, only install if there's a binary package.
 python3 -m pip install --only-binary=:all: numpy || true
 python3 -m pip install --only-binary=:all: pyarrow || true

.github/workflows/test-mingw.yml

@@ -78,7 +78,7 @@ jobs:
           pushd depends && ./install_extra_test_images.sh && popd
 
       - name: Build Pillow
-        run: CFLAGS="-coverage" python3 -m pip install .
+        run: CFLAGS="-coverage" python3 -m pip install .[tests]
 
       - name: Test Pillow
         run: |

Makefile

@@ -62,7 +62,7 @@ install:
 
 .PHONY: install-coverage
 install-coverage:
-	CFLAGS="-coverage -Werror=implicit-function-declaration" python3 -m pip -v install .
+	CFLAGS="-coverage -Werror=implicit-function-declaration" python3 -m pip -v install .[tests]
 	python3 selftest.py
 
 .PHONY: debug