diff --git a/.github/workflows/php.yml b/.github/workflows/php.yml
index 31d202e..5b0197f 100644
--- a/.github/workflows/php.yml
+++ b/.github/workflows/php.yml
@@ -46,11 +46,11 @@ jobs:
           coverage: pcov
           tools: composer:v2
 
-      - name: Determine composer cache directory on Linux
+      - name: Determine composer cache directory (Linux/MacOS)
         if: matrix.os != 'windows-latest'
         run: echo "COMPOSER_CACHE_DIR=$(composer config cache-dir)" >> $GITHUB_ENV
 
-      - name: Determine composer cache directory on Windows
+      - name: Determine composer cache directory (Windows)
         if: matrix.os == 'windows-latest'
         run: echo "COMPOSER_CACHE_DIR=~\AppData\Local\Composer" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
 
@@ -64,7 +64,7 @@ jobs:
       - name: Validate composer.json and composer.lock
         run: composer validate --ansi
 
-      - name: Install dependencies (Linux)
+      - name: Install dependencies (Linux/MacOS)
         if: matrix.os != 'windows-latest'
         run: |
           make install
@@ -73,7 +73,7 @@ jobs:
       - name: Install dependencies (Windows)
         if: matrix.os == 'windows-latest'
         run: |
-          make install
+          composer install --prefer-dist --no-interaction --no-progress --ansi
           composer require symfony/yaml:5.1.8 --prefer-dist --no-interaction --ansi
 
       - name: Validate test data
@@ -84,9 +84,14 @@ jobs:
         if: matrix.os == 'ubuntu-latest'
         run: make stan
 
-      - name: PHPUnit tests
+      - name: PHPUnit tests (Linux/MacOS)
+        if: matrix.os != 'windows-latest'
         run: make test
 
+      - name: PHPUnit tests (Windows)
+        if: matrix.os == 'windows-latest'
+        run: vendor/phpunit/phpunit/phpunit --colors=always
+
       - name: Check code style
         if: matrix.os == 'ubuntu-latest'
         run: make check-style
diff --git a/Makefile b/Makefile
index 72c05d9..627df52 100644
--- a/Makefile
+++ b/Makefile
@@ -17,11 +17,11 @@ fix-style: php-cs-fixer.phar
 	./php-cs-fixer.phar fix src/ --diff
 
 install:
-	composer install --prefer-dist --no-interaction --no-progress --no-suggest --ansi
+	composer install --prefer-dist --no-interaction --no-progress --ansi
 	yarn install
 
 test:
-	php $(PHPARGS) $(XPHPARGS) vendor/bin/phpunit --verbose --color $(TESTCASE)
+	php $(PHPARGS) $(XPHPARGS) vendor/bin/phpunit --verbose --colors=always $(TESTCASE)
 	php $(PHPARGS) $(XPHPARGS) bin/php-openapi validate tests/spec/data/recursion.json
 	php $(PHPARGS) $(XPHPARGS) bin/php-openapi validate tests/spec/data/recursion2.yaml