diff --git a/src/Monolog/Formatter/LineFormatter.php b/src/Monolog/Formatter/LineFormatter.php
index 9fe43193..c63b39d3 100644
--- a/src/Monolog/Formatter/LineFormatter.php
+++ b/src/Monolog/Formatter/LineFormatter.php
@@ -180,8 +180,12 @@ class LineFormatter extends NormalizerFormatter
                 $str .= ' faultactor: ' . $e->faultactor;
             }
 
-            if (isset($e->detail) && (is_string($e->detail) || is_object($e->detail) || is_array($e->detail))) {
-                $str .= ' detail: ' . (is_string($e->detail) ? $e->detail : reset($e->detail));
+            if (isset($e->detail)) {
+                if (is_string($e->detail)) {
+                    $str .= ' detail: ' . $e->detail;
+                } elseif (is_object($e->detail) || is_array($e->detail)) {
+                    $str .= ' detail: ' . $this->toJson($e->detail, true);
+                }
             }
         }
         $str .= '): ' . $e->getMessage() . ' at ' . $e->getFile() . ':' . $e->getLine() . ')';
diff --git a/tests/Monolog/Formatter/LineFormatterTest.php b/tests/Monolog/Formatter/LineFormatterTest.php
index 1b115b9f..86d22d38 100644
--- a/tests/Monolog/Formatter/LineFormatterTest.php
+++ b/tests/Monolog/Formatter/LineFormatterTest.php
@@ -192,6 +192,19 @@ class LineFormatterTest extends \PHPUnit\Framework\TestCase
         $path = str_replace('\\/', '/', json_encode(__FILE__));
 
         $this->assertEquals('['.date('Y-m-d').'] core.CRITICAL: foobar {"exception":"[object] (SoapFault(code: 0 faultcode: foo faultactor: hello detail: world): bar at '.substr($path, 1, -1).':'.(__LINE__ - 8).')"} []'."\n", $message);
+
+        $message = $formatter->format([
+            'level_name' => 'CRITICAL',
+            'channel' => 'core',
+            'context' => ['exception' => new \SoapFault('foo', 'bar', 'hello', (object) ['bar' => (object) ['biz' => 'baz'], 'foo' => 'world'])],
+            'datetime' => new \DateTimeImmutable,
+            'extra' => [],
+            'message' => 'foobar',
+        ]);
+
+        $path = str_replace('\\/', '/', json_encode(__FILE__));
+
+        $this->assertEquals('['.date('Y-m-d').'] core.CRITICAL: foobar {"exception":"[object] (SoapFault(code: 0 faultcode: foo faultactor: hello detail: {\"bar\":{\"biz\":\"baz\"},\"foo\":\"world\"}): bar at '.substr($path, 1, -1).':'.(__LINE__ - 8).')"} []'."\n", $message);
     }
 
     public function testBatchFormat()
diff --git a/tests/Monolog/Formatter/NormalizerFormatterTest.php b/tests/Monolog/Formatter/NormalizerFormatterTest.php
index 3b06380b..90dd835f 100644
--- a/tests/Monolog/Formatter/NormalizerFormatterTest.php
+++ b/tests/Monolog/Formatter/NormalizerFormatterTest.php
@@ -107,15 +107,15 @@ class NormalizerFormatterTest extends TestCase
         ], $formatted);
 
         $formatter = new NormalizerFormatter('Y-m-d');
-        $e = new \SoapFault('foo', 'bar', 'hello', (object) array('bar' => (object) array('biz' => 'baz'), 'foo' => 'world'));
-        $formatted = $formatter->format(array(
+        $e = new \SoapFault('foo', 'bar', 'hello', (object) ['bar' => (object) ['biz' => 'baz'], 'foo' => 'world']);
+        $formatted = $formatter->format([
             'exception' => $e,
-        ));
+        ]);
 
         unset($formatted['exception']['trace']);
 
-        $this->assertEquals(array(
-            'exception' => array(
+        $this->assertEquals([
+            'exception' => [
                 'class' => 'SoapFault',
                 'message' => 'bar',
                 'code' => 0,
@@ -123,8 +123,8 @@ class NormalizerFormatterTest extends TestCase
                 'faultcode' => 'foo',
                 'faultactor' => 'hello',
                 'detail' => '{"bar":{"biz":"baz"},"foo":"world"}',
-            ),
-        ), $formatted);
+            ],
+        ], $formatted);
     }
 
     public function testFormatToStringExceptionHandle()