diff --git a/activerecord/test/cases/connection_pool_test.rb b/activerecord/test/cases/connection_pool_test.rb
index d5365b695eae72d7012055b1d43d502598054fd4..2da51ea0150eb2139f05ab56b0401a1fa0670ab0 100644
--- a/activerecord/test/cases/connection_pool_test.rb
+++ b/activerecord/test/cases/connection_pool_test.rb
@@ -118,6 +118,7 @@ def test_removing_releases_latch
         connection = cs.first
         @pool.remove connection
         assert_respond_to t.join.value, :execute
+        connection.close
       end
 
       def test_reap_and_active