diff --git a/tests/Modules/DisplayTest.php b/tests/Modules/DisplayTest.php
index 22ee6e7..7eade1b 100644
--- a/tests/Modules/DisplayTest.php
+++ b/tests/Modules/DisplayTest.php
@@ -47,7 +47,9 @@ public function testDisableLoadDisplay()
      */
     public function testLoadLocation()
     {
-        define('TEST_MODE', true);
+        if (!defined('TEST_MODE')) {
+            define('TEST_MODE', true);
+        }
         $location = 'http://example.com';
 
         $_conf = Conf::instance();
diff --git a/tests/Modules/LogFileTest.php b/tests/Modules/LogFileTest.php
index 2723bf5..a08c9f1 100644
--- a/tests/Modules/LogFileTest.php
+++ b/tests/Modules/LogFileTest.php
@@ -21,7 +21,7 @@ public function testLogDirIsNotWritable()
         $this->assertFalse($this->_logFile->createLogFile());
     }
 
-    public function testCreateLogISDisabled()
+    public function testCreateLogIsDisabled()
     {
         $this->dirChmod(0777);
         MockTest::mockConf('createLogFile', false);
@@ -36,7 +36,89 @@ public function testCreateLogFile()
         $this->assertTrue($this->_logFile->createLogFile());
     }
 
+    public function testLoadLogDisplayWithoutBacktrace()
+    {
+        MockTest::injectStatic(
+            'Ignaszak\Exception\Controller\IController',
+            'errorArray',
+            [
+                0 => [
+                    'type' => 'Warning',
+                    'message' => 'anyMessage',
+                    'file' => 'anyFile',
+                    'line' => 1,
+                ]
+            ]
+        );
+        $result = MockTest::callMockMethod($this->_logFile, 'loadLogDisplay');
+        $this->assertEquals(
+            [
+                'errors' => <<<EOT
+#1 [Warning]
+    anyMessage in anyFile on line 1
+
+
+EOT
+                ,
+                'errorsCount' => 1
+
+            ],
+            $result
+        );
+        MockTest::injectStatic(
+            'Ignaszak\Exception\Controller\IController',
+            'errorArray',
+            []
+        );
+    }
 
+    public function testLoadLogDisplayWithBacktrace()
+    {
+        MockTest::injectStatic(
+            'Ignaszak\Exception\Controller\IController',
+            'errorArray',
+            [
+                0 => [
+                    'type' => 'Warning',
+                    'message' => 'anyMessage',
+                    'file' => 'anyFile',
+                    'line' => 1,
+                    'trace' => [
+                        0 => [
+                            'message' => 'backtraceMEssage',
+                            'file' => 'backtraceFile',
+                            'arguments' => 'anyArguments'
+                        ]
+                    ]
+                ]
+            ]
+        );
+        $result = MockTest::callMockMethod($this->_logFile, 'loadLogDisplay');
+        $this->assertEquals(
+            [
+                'errors' => <<<EOT
+#1 [Warning]
+    anyMessage in anyFile on line 1
+    [Backtrace]:
+        backtraceMEssage
+              IN: backtraceFile
+              ARGUMENTS:
+                  anyArguments
+
+
+EOT
+            ,
+            'errorsCount' => 1
+
+            ],
+            $result
+        );
+        MockTest::injectStatic(
+            'Ignaszak\Exception\Controller\IController',
+            'errorArray',
+            []
+        );
+    }
 
     private function dirChmod($mode)
     {