diff --git a/src/main/java/com/zaxxer/hikari/pool/PoolBase.java b/src/main/java/com/zaxxer/hikari/pool/PoolBase.java
index 9e7f766e1..b9d253035 100644
--- a/src/main/java/com/zaxxer/hikari/pool/PoolBase.java
+++ b/src/main/java/com/zaxxer/hikari/pool/PoolBase.java
@@ -220,6 +220,7 @@ void resetConnectionState(final Connection connection, final ProxyConnection pro
       }
 
       if ((dirtyBits & DIRTY_BIT_ISOLATION) != 0 && proxyConnection.getTransactionIsolationState() != transactionIsolation) {
+         //noinspection MagicConstant
          connection.setTransactionIsolation(transactionIsolation);
          resetBits |= DIRTY_BIT_ISOLATION;
       }
@@ -428,6 +429,7 @@ private void setupConnection(final Connection connection) throws ConnectionSetup
          checkDriverSupport(connection);
 
          if (transactionIsolation != defaultTransactionIsolation) {
+            //noinspection MagicConstant
             connection.setTransactionIsolation(transactionIsolation);
          }