diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 608b339..58d7095 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -32,7 +32,4 @@ jobs:
           extensions: zlib
           coverage: xdebug
       - run: composer install
-      - run: vendor/bin/phpunit --coverage-text
-        if: ${{ matrix.php >= 7.3 }}
-      - run: vendor/bin/phpunit --coverage-text -c phpunit.xml.legacy
-        if: ${{ matrix.php < 7.3 }}
+      - run: vendor/bin/phpunit --coverage-text ${{ matrix.php < 7.3 && '-c phpunit.xml.legacy' || '' }}
diff --git a/composer.json b/composer.json
index 67f72ed..3fa40f7 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
         "react/stream": "^1.2"
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.6 || ^6.5",
+        "phpunit/phpunit": "^9.6 || ^8.5 || ^6.5",
         "react/event-loop": "^1.2"
     },
     "autoload": {