diff --git a/src/TicketSwapErrorFormatter.php b/src/TicketSwapErrorFormatter.php
index 3884b35..bd91324 100644
--- a/src/TicketSwapErrorFormatter.php
+++ b/src/TicketSwapErrorFormatter.php
@@ -210,7 +210,7 @@ public static function highlight(string $message, ?string $tip, ?string $identif
 
         // Full Qualified Class Names
         $message = (string) preg_replace(
-            "/([A-Z0-9]{1}[A-Za-z0-9_\-]+[\\\]+[A-Z0-9]{1}[A-Za-z0-9_\-\\\]+)/",
+            "/([\\\]?[A-Z0-9]{1}[A-Za-z0-9_\-]+[\\\]+[A-Z0-9]{1}[A-Za-z0-9_\-\\\]+)/",
             '<fg=yellow>$1</>',
             $message,
         );
diff --git a/tests/TicketSwapErrorFormatterTest.php b/tests/TicketSwapErrorFormatterTest.php
index cb2984c..fc3b5e5 100644
--- a/tests/TicketSwapErrorFormatterTest.php
+++ b/tests/TicketSwapErrorFormatterTest.php
@@ -210,6 +210,13 @@ public static function provideHighlight() : iterable
             null,
             true
         ];
+        yield [
+            "Array has 3 duplicate keys with value '<fg=yellow>App\Activity</>' (<fg=yellow>\App\Activity</>::class).",
+            "Array has 3 duplicate keys with value 'App\Activity' (\App\Activity::class).",
+            null,
+            null,
+            true
+        ];
     }
 
     /**