diff --git a/hikaricp-java6/src/main/java/com/zaxxer/hikari/pool/HikariPool.java b/hikaricp-java6/src/main/java/com/zaxxer/hikari/pool/HikariPool.java
index bd9fe91e..44570e3b 100644
--- a/hikaricp-java6/src/main/java/com/zaxxer/hikari/pool/HikariPool.java
+++ b/hikaricp-java6/src/main/java/com/zaxxer/hikari/pool/HikariPool.java
@@ -118,6 +118,7 @@ public final class HikariPool extends BaseHikariPool
    protected boolean isConnectionAlive(final Connection connection)
    {
       try {
+         LOGGER.debug("Performing alive check for connection {}", connection);
          final int timeoutSec = (int) TimeUnit.MILLISECONDS.toSeconds(validationTimeout);
 
          if (isUseJdbc4Validation) {
diff --git a/hikaricp/src/main/java/com/zaxxer/hikari/pool/HikariPool.java b/hikaricp/src/main/java/com/zaxxer/hikari/pool/HikariPool.java
index e5a72c67..caa6e6b9 100644
--- a/hikaricp/src/main/java/com/zaxxer/hikari/pool/HikariPool.java
+++ b/hikaricp/src/main/java/com/zaxxer/hikari/pool/HikariPool.java
@@ -107,6 +107,7 @@ public final class HikariPool extends BaseHikariPool
    protected boolean isConnectionAlive(final Connection connection)
    {
       try {
+         LOGGER.debug("Performing alive check for connection {}", connection);
          int timeoutSec = (int) TimeUnit.MILLISECONDS.toSeconds(validationTimeout);
 
          if (isUseJdbc4Validation) {