diff --git a/tests/PHPCurlClass/PHPCurlClassTest.php b/tests/PHPCurlClass/PHPCurlClassTest.php
index 2f843ca..1b1ed39 100644
--- a/tests/PHPCurlClass/PHPCurlClassTest.php
+++ b/tests/PHPCurlClass/PHPCurlClassTest.php
@@ -1107,8 +1107,14 @@ class CurlTest extends \PHPUnit\Framework\TestCase
         $this->assertTrue($test->curl->error);
         $this->assertTrue($test->curl->curlError);
         $possible_errors = array(CURLE_SEND_ERROR, CURLE_OPERATION_TIMEOUTED);
-        $this->assertTrue(in_array($test->curl->errorCode, $possible_errors, true));
-        $this->assertTrue(in_array($test->curl->curlErrorCode, $possible_errors, true));
+        $this->assertTrue(
+            in_array($test->curl->errorCode, $possible_errors, true),
+            'errorCode: ' . $test->curl->errorCode
+        );
+        $this->assertTrue(
+            in_array($test->curl->curlErrorCode, $possible_errors, true),
+            'curlErrorCode: ' . $test->curl->curlErrorCode
+        );
     }
 
     public function testErrorMessage()
diff --git a/tests/PHPCurlClass/PHPMultiCurlClassTest.php b/tests/PHPCurlClass/PHPMultiCurlClassTest.php
index 3cb57a4..74af196 100644
--- a/tests/PHPCurlClass/PHPMultiCurlClassTest.php
+++ b/tests/PHPCurlClass/PHPMultiCurlClassTest.php
@@ -602,8 +602,14 @@ class MultiCurlTest extends \PHPUnit\Framework\TestCase
             \PHPUnit\Framework\Assert::assertTrue($instance->curlError);
             \PHPUnit\Framework\Assert::assertFalse($instance->httpError);
             $possible_errors = array(CURLE_SEND_ERROR, CURLE_OPERATION_TIMEOUTED);
-            \PHPUnit\Framework\Assert::assertTrue(in_array($instance->errorCode, $possible_errors, true));
-            \PHPUnit\Framework\Assert::assertTrue(in_array($instance->curlErrorCode, $possible_errors, true));
+            \PHPUnit\Framework\Assert::assertTrue(
+                in_array($instance->errorCode, $possible_errors, true),
+                'errorCode: ' . $instance->errorCode
+            );
+            \PHPUnit\Framework\Assert::assertTrue(
+                in_array($instance->curlErrorCode, $possible_errors, true),
+                'curlErrorCode: ' . $instance->curlErrorCode
+            );
         });
 
         $multi_curl->addDelete(Test::ERROR_URL);