diff --git a/src/tests/unit-tests/bootstrap.php b/src/tests/unit-tests/bootstrap.php
index c5203baf992d561ab60b09f88c04a98ba8e0d709..f13e5c87315bd5b1ffd466c78b48faf0fc6d4326 100644
--- a/src/tests/unit-tests/bootstrap.php
+++ b/src/tests/unit-tests/bootstrap.php
@@ -31,3 +31,6 @@ if (class_exists('Phix_Project\ContractLib\Contract'))
 {
         \Phix_Project\ContractLib\Contract::EnforceWrappedContracts();
 }
+
+// step 5: Set error level to include E_STRICT
+\error_reporting(\E_ALL | \E_STRICT);
\ No newline at end of file