diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index b862e61..688800a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -32,7 +32,18 @@ jobs:
       - name: "Install Composer dependencies"
         timeout-minutes: 1
         run: |
-          composer install -o
+          php -r "assert(true);" || echo fail
+          php -r "assert(false);" || echo fail
+          XDEBUG_MODE=off php -r "assert(false);" || echo fail
+          php -r "var_dump(ini_get('zend.assertions'));" || echo fail
+          XDEBUG_MODE=off php -r "var_dump(ini_get('zend.assertions'));" || echo fail
+          php -r "var_dump(ini_get('assert.active'));" || echo fail
+          XDEBUG_MODE=off php -r "var_dump(ini_get('assert.active'));" || echo fail
+          php -r "var_dump(ini_get('assert.exception'));" || echo fail
+          XDEBUG_MODE=off php -r "var_dump(ini_get('assert.exception'));" || echo fail
+          php -r "var_dump(ini_get('assert.bail'));" || echo fail
+          XDEBUG_MODE=off php -r "var_dump(ini_get('assert.bail'));" || echo fail
+          false
 
       - name: "Run Composer check"
         timeout-minutes: 1