diff --git a/src/Plugin/Block/ReferenceAuthorsBlock.php b/src/Plugin/Block/ReferenceAuthorsBlock.php
index 92ff4b7e39b2fb71cb1cec5c3472ef82e7070b0f..7ba7b87a6d597ed904856441ac8cd17d58274024 100644
--- a/src/Plugin/Block/ReferenceAuthorsBlock.php
+++ b/src/Plugin/Block/ReferenceAuthorsBlock.php
@@ -101,7 +101,7 @@ class ReferenceAuthorsBlock extends BlockBase implements ContainerFactoryPluginI
     // before using view, to prevent call function on null errors.
     if (!$view) {
       return [
-        '#markup' => $this->t('There was an error loading the block.')
+        '#markup' => $this->t('There was an error loading the block.'),
       ];
     }
 
diff --git a/src/Plugin/Block/ReferenceBlock.php b/src/Plugin/Block/ReferenceBlock.php
index 9e9be2933bf8a72402311561749f0b77ea3e2606..b908ebe830974d5ea2f346fe444faa332c9c87e9 100644
--- a/src/Plugin/Block/ReferenceBlock.php
+++ b/src/Plugin/Block/ReferenceBlock.php
@@ -101,7 +101,7 @@ class ReferenceBlock extends BlockBase implements ContainerFactoryPluginInterfac
     // before using view, to prevent call function on null errors.
     if (!$view) {
       return [
-        '#markup' => $this->t('There was an error loading the block.')
+        '#markup' => $this->t('There was an error loading the block.'),
       ];
     }
 
diff --git a/src/Plugin/Block/ReferenceKeywordsBlock.php b/src/Plugin/Block/ReferenceKeywordsBlock.php
index 5a9b793f1e141fe168a5403a7137c5d181eb84e1..8c654585ad630b1bc7e8557986f43ced75358e45 100644
--- a/src/Plugin/Block/ReferenceKeywordsBlock.php
+++ b/src/Plugin/Block/ReferenceKeywordsBlock.php
@@ -101,7 +101,7 @@ class ReferenceKeywordsBlock extends BlockBase implements ContainerFactoryPlugin
     // before using view, to prevent call function on null errors.
     if (!$view) {
       return [
-        '#markup' => $this->t('There was an error loading the block.')
+        '#markup' => $this->t('There was an error loading the block.'),
       ];
     }