diff --git a/src/Core/CoreKernel.php b/src/Core/CoreKernel.php
index ceb3ac352..934e30028 100644
--- a/src/Core/CoreKernel.php
+++ b/src/Core/CoreKernel.php
@@ -285,18 +285,19 @@ class CoreKernel implements Kernel
 
         // Build error response
         $dv = new DebugView();
-        $body =
-            $dv->renderHeader() .
+        $body = implode([
+            $dv->renderHeader(),
             $dv->renderInfo(
                 "Configuration Error",
                 Director::absoluteBaseURL()
-            ) .
+            ),
             $dv->renderParagraph(
                 'You need to replace your _ss_environment.php file with a .env file, or with environment variables.<br><br>'
                 . 'See the <a href="https://docs.silverstripe.org/en/4/getting_started/environment_management/">'
                 . 'Environment Management</a> docs for more information.'
-            ) .
-            $dv->renderFooter();
+            ),
+            $dv->renderFooter()
+        ]);
 
         // Raise error
         $response = new HTTPResponse($body, 500);
diff --git a/src/ORM/DataObject.php b/src/ORM/DataObject.php
index e0ed2aeb8..4a74a35ae 100644
--- a/src/ORM/DataObject.php
+++ b/src/ORM/DataObject.php
@@ -2102,12 +2102,11 @@ class DataObject extends ViewableData implements DataObjectInterface, i18nEntity
         // If we haven't been written yet, we can't save these relations, so use a list that handles this case
         if (!$id) {
             if (!isset($this->unsavedRelations[$componentName])) {
-                $this->unsavedRelations[$componentName] =
-                    new UnsavedRelationList(
-                        $manyManyComponent['parentClass'],
-                        $componentName,
-                        $manyManyComponent['childClass']
-                    );
+                $this->unsavedRelations[$componentName] = new UnsavedRelationList(
+                    $manyManyComponent['parentClass'],
+                    $componentName,
+                    $manyManyComponent['childClass']
+                );
             }
             return $this->unsavedRelations[$componentName];
         }
diff --git a/src/Security/PermissionCheckboxSetField.php b/src/Security/PermissionCheckboxSetField.php
index ef039bd4b..3f91e33e7 100644
--- a/src/Security/PermissionCheckboxSetField.php
+++ b/src/Security/PermissionCheckboxSetField.php
@@ -268,15 +268,15 @@ class PermissionCheckboxSetField extends FormField
             }
         }
         if ($this->readonly) {
+            $message = _t(
+                'SilverStripe\\Security\\Permission.UserPermissionsIntro',
+                'Assigning groups to this user will adjust the permissions they have.'
+                . ' See the groups section for details of permissions on individual groups.'
+            );
+
             return
                 "<ul id=\"{$this->ID()}\" class=\"optionset checkboxsetfield{$this->extraClass()}\">\n" .
-                "<li class=\"help\">" .
-                _t(
-                    'SilverStripe\\Security\\Permission.UserPermissionsIntro',
-                    'Assigning groups to this user will adjust the permissions they have.'
-                    . ' See the groups section for details of permissions on individual groups.'
-                ) .
-                "</li>" .
+                "<li class=\"help\">" . $message . "</li>" .
                 $options .
                 "</ul>\n";
         } else {
diff --git a/src/includes/constants.php b/src/includes/constants.php
index 44dbc9a1f..a64f2948a 100644
--- a/src/includes/constants.php
+++ b/src/includes/constants.php
@@ -41,13 +41,17 @@ if (!defined('BASE_PATH')) {
     define('BASE_PATH', call_user_func(function () {
         // Determine BASE_PATH based on the composer autoloader
         foreach (debug_backtrace() as $backtraceItem) {
-            if (isset($backtraceItem['file'])
-                && preg_match(
-                    '#^(?<base>.*)(/|\\\\)vendor(/|\\\\)composer(/|\\\\)autoload_real.php#',
-                    $backtraceItem['file'],
-                    $matches
-                )
-            ) {
+            if (!isset($backtraceItem['file'])) {
+                continue;
+            }
+
+            $matched = preg_match(
+                '#^(?<base>.*)(/|\\\\)vendor(/|\\\\)composer(/|\\\\)autoload_real.php#',
+                $backtraceItem['file'],
+                $matches
+            );
+
+            if ($matched) {
                 return realpath($matches['base']) ?: DIRECTORY_SEPARATOR;
             }
         }
diff --git a/tests/php/ORM/DataListTest.php b/tests/php/ORM/DataListTest.php
index baecfeaf7..e3daaabc1 100755
--- a/tests/php/ORM/DataListTest.php
+++ b/tests/php/ORM/DataListTest.php
@@ -1039,11 +1039,9 @@ class DataListTest extends SapphireTest
             ->leftJoin(
                 'DataObjectTest_Team',
                 '"DataObjectTest_Team"."ID" = "DataObjectTest_TeamComment"."TeamID"'
-            )->filter(
-                array(
+            )->filter([
                 'Title' => 'Team 1'
-                )
-            );
+            ]);
 
         $this->assertEquals(2, $list->count());
         $values = $list->column('Name');