1 files changed, 9 insertions, 0 deletions
diff --git a/activerecord/test/cases/transactions_test.rb b/activerecord/test/cases/transactions_test.rb
index b4ac2f8830..9ab2bddeb2 100644
--- a/activerecord/test/cases/transactions_test.rb
+++ b/activerecord/test/cases/transactions_test.rb
@@ -581,5 +581,14 @@ if current_adapter?(:PostgreSQLAdapter)
 
       assert_equal original_salary, Developer.find(1).salary
     end
+
+    test "#transaction_joinable= is deprecated" do
+      Developer.transaction do
+        conn = Developer.connection
+        assert conn.current_transaction.joinable?
+        assert_deprecated { conn.transaction_joinable = false }
+        assert !conn.current_transaction.joinable?
+      end
+    end
   end
 end