diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 4210a8a..ca463eb 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -66,6 +66,8 @@ jobs:
     strategy:
       matrix:
         php-version:
+          - "7.0"
+          - "7.1"
           - "7.2"
 
     steps:
@@ -74,8 +76,9 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: "${{ matrix.php-version }}"
-          coverage: pcov
       - name: Composer
-        run: composer require --dev phpunit/phpunit ^8
+        run: |
+          echo '{"autoload": {"psr-4": {"Icewind\\Streams\\": "src/"}},"autoload-dev": {"psr-4": {"Icewind\\Streams\\Tests\\": "tests/"}}}' > composer.json
+          composer require --dev phpunit/phpunit ^6
       - name: PHPUnit Tests
         run: php ./vendor/bin/phpunit tests  -c tests/phpunit.xml
diff --git a/composer.json b/composer.json
index 3caace3..5e3689e 100644
--- a/composer.json
+++ b/composer.json
@@ -9,7 +9,7 @@
 		}
 	],
 	"require": {
-		"php": ">=7.2"
+		"php": ">=7.0"
 	},
 	"require-dev": {
 		"phpunit/phpunit": "^9",