diff --git a/activerecord/test/cases/adapters/mysql2/connection_test.rb b/activerecord/test/cases/adapters/mysql2/connection_test.rb
index c1de2218e2c4b712ddf7a26bbee7cadeba849a92..bae283a0487d0244e2df1d6cd2a586c310c7820f 100644
--- a/activerecord/test/cases/adapters/mysql2/connection_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/connection_test.rb
@@ -66,9 +66,10 @@ def test_successful_reconnection_after_timeout_with_verify
   def test_execute_after_disconnect
     @connection.disconnect!
 
-    assert_raise(ActiveRecord::StatementInvalid) do
+    error = assert_raise(ActiveRecord::StatementInvalid) do
       @connection.execute("SELECT 1")
     end
+    assert_kind_of Mysql2::Error, error.cause
   end
 
   def test_quote_after_disconnect