diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d36dfd3..e430a77 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -16,13 +16,13 @@ jobs:
         php: [
           '5.3', '5.4', '5.5', '5.6',
           '7.0', '7.1', '7.2', '7.3', '7.4',
-          '8.0', '8.1', '8.2'
+          '8.0', '8.1', '8.2', '8.3'
         ]
 
     name: PHP ${{ matrix.php }}
 
     steps:
-      - name: Setup PHP ${{ matrix.php-version }}
+      - name: Setup PHP ${{ matrix.php }}
         uses: shivammathur/setup-php@v2
         with:
           php-version: ${{ matrix.php }}
diff --git a/src/PostgresError.php b/src/PostgresError.php
index 4de9c43..7bf5661 100644
--- a/src/PostgresError.php
+++ b/src/PostgresError.php
@@ -302,9 +302,6 @@ class PostgresError
     const UNDEFINED_FILE = '58P01';
     const DUPLICATE_FILE = '58P02';
 
-    // Class 72 - Snapshot Failure
-    const SNAPSHOT_TOO_OLD = '72000';
-
     // Class F0 - Configuration File Error
     const CONFIG_FILE_ERROR = 'F0000';
     const LOCK_FILE_EXISTS = 'F0001';