diff --git a/administrator/components/com_scheduler/src/Field/WebcronLinkField.php b/administrator/components/com_scheduler/src/Field/WebcronLinkField.php
index 77ebbe77376ae..772b8899fcdf0 100644
--- a/administrator/components/com_scheduler/src/Field/WebcronLinkField.php
+++ b/administrator/components/com_scheduler/src/Field/WebcronLinkField.php
@@ -47,7 +47,7 @@ protected function getLayoutPaths(): array
         $s = DIRECTORY_SEPARATOR;
 
         return array_merge(
-            [JPATH_ADMINISTRATOR . "${s}/components${s}com_scheduler${s}layouts${s}"],
+            [JPATH_ADMINISTRATOR . "{$s}/components{$s}com_scheduler{$s}layouts{$s}"],
             parent::getLayoutPaths()
         );
     }
diff --git a/administrator/components/com_scheduler/src/Task/TaskOption.php b/administrator/components/com_scheduler/src/Task/TaskOption.php
index 02dbf8997f33b..c085e23c0546b 100644
--- a/administrator/components/com_scheduler/src/Task/TaskOption.php
+++ b/administrator/components/com_scheduler/src/Task/TaskOption.php
@@ -73,8 +73,8 @@ class TaskOption
     public function __construct(string $type, string $langConstPrefix)
     {
         $this->id              = $type;
-        $this->title           = Text::_("${langConstPrefix}_TITLE");
-        $this->desc            = Text::_("${langConstPrefix}_DESC");
+        $this->title           = Text::_("{$langConstPrefix}_TITLE");
+        $this->desc            = Text::_("{$langConstPrefix}_DESC");
         $this->langConstPrefix = $langConstPrefix;
     }
 
diff --git a/libraries/src/Console/TasksStateCommand.php b/libraries/src/Console/TasksStateCommand.php
index 384edeb1c943c..5b23a63c78400 100644
--- a/libraries/src/Console/TasksStateCommand.php
+++ b/libraries/src/Console/TasksStateCommand.php
@@ -130,14 +130,14 @@ protected function doExecute(InputInterface $input, OutputInterface $output): in
 
         // We couldn't fetch that task :(
         if (empty($task->id)) {
-            $this->ioStyle->error("Task ID '${id}' does not exist!");
+            $this->ioStyle->error("Task ID '{$id}' does not exist!");
 
             return 1;
         }
 
         // If the item is checked-out we need a check in (currently not possible through the CLI)
         if ($taskModel->isCheckedOut($task)) {
-            $this->ioStyle->error("Task ID '${id}' is checked out!");
+            $this->ioStyle->error("Task ID '{$id}' is checked out!");
 
             return 1;
         }
@@ -148,12 +148,12 @@ protected function doExecute(InputInterface $input, OutputInterface $output): in
         $action = Task::STATE_MAP[$state];
 
         if (!$table->publish($id, $state)) {
-            $this->ioStyle->error("Can't ${action} Task ID '${id}'");
+            $this->ioStyle->error("Can't {$action} Task ID '{$id}'");
 
             return 3;
         }
 
-        $this->ioStyle->success("Task ID ${id} ${action}.");
+        $this->ioStyle->success("Task ID {$id} {$action}.");
 
         return 0;
     }
diff --git a/libraries/src/Installer/Adapter/PluginAdapter.php b/libraries/src/Installer/Adapter/PluginAdapter.php
index a98e7a7d14668..f5b96b7b6fa47 100644
--- a/libraries/src/Installer/Adapter/PluginAdapter.php
+++ b/libraries/src/Installer/Adapter/PluginAdapter.php
@@ -295,7 +295,7 @@ public function loadLanguage($path = null)
             }
 
             if ($name) {
-                $extension = "plg_${group}_${name}";
+                $extension = "plg_{$group}_{$name}";
                 $source = $path ?: JPATH_PLUGINS . "/$group/$name";
                 $folder = (string) $element->attributes()->folder;