diff --git a/src/test/java/com/zaxxer/hikari/performance/StubConnection.java b/src/test/java/com/zaxxer/hikari/mocks/StubConnection.java
similarity index 99%
rename from src/test/java/com/zaxxer/hikari/performance/StubConnection.java
rename to src/test/java/com/zaxxer/hikari/mocks/StubConnection.java
index dbb7219f..0a55b138 100644
--- a/src/test/java/com/zaxxer/hikari/performance/StubConnection.java
+++ b/src/test/java/com/zaxxer/hikari/mocks/StubConnection.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package com.zaxxer.hikari.performance;
+package com.zaxxer.hikari.mocks;
 
 import java.sql.Array;
 import java.sql.Blob;
diff --git a/src/test/java/com/zaxxer/hikari/performance/StubDataSource.java b/src/test/java/com/zaxxer/hikari/mocks/StubDataSource.java
similarity index 98%
rename from src/test/java/com/zaxxer/hikari/performance/StubDataSource.java
rename to src/test/java/com/zaxxer/hikari/mocks/StubDataSource.java
index 19f2c8b1..f085730e 100644
--- a/src/test/java/com/zaxxer/hikari/performance/StubDataSource.java
+++ b/src/test/java/com/zaxxer/hikari/mocks/StubDataSource.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package com.zaxxer.hikari.performance;
+package com.zaxxer.hikari.mocks;
 
 import java.io.PrintWriter;
 import java.sql.Connection;
diff --git a/src/test/java/com/zaxxer/hikari/performance/StubDriver.java b/src/test/java/com/zaxxer/hikari/mocks/StubDriver.java
similarity index 98%
rename from src/test/java/com/zaxxer/hikari/performance/StubDriver.java
rename to src/test/java/com/zaxxer/hikari/mocks/StubDriver.java
index 3ef07c54..aff1bfae 100644
--- a/src/test/java/com/zaxxer/hikari/performance/StubDriver.java
+++ b/src/test/java/com/zaxxer/hikari/mocks/StubDriver.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package com.zaxxer.hikari.performance;
+package com.zaxxer.hikari.mocks;
 
 import java.sql.Connection;
 import java.sql.Driver;
diff --git a/src/test/java/com/zaxxer/hikari/performance/StubPreparedStatement.java b/src/test/java/com/zaxxer/hikari/mocks/StubPreparedStatement.java
similarity index 99%
rename from src/test/java/com/zaxxer/hikari/performance/StubPreparedStatement.java
rename to src/test/java/com/zaxxer/hikari/mocks/StubPreparedStatement.java
index 52d23154..ba949ba5 100644
--- a/src/test/java/com/zaxxer/hikari/performance/StubPreparedStatement.java
+++ b/src/test/java/com/zaxxer/hikari/mocks/StubPreparedStatement.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package com.zaxxer.hikari.performance;
+package com.zaxxer.hikari.mocks;
 
 import java.io.InputStream;
 import java.io.Reader;
diff --git a/src/test/java/com/zaxxer/hikari/performance/StubResultSet.java b/src/test/java/com/zaxxer/hikari/mocks/StubResultSet.java
similarity index 99%
rename from src/test/java/com/zaxxer/hikari/performance/StubResultSet.java
rename to src/test/java/com/zaxxer/hikari/mocks/StubResultSet.java
index dc3adf8e..d5024a88 100644
--- a/src/test/java/com/zaxxer/hikari/performance/StubResultSet.java
+++ b/src/test/java/com/zaxxer/hikari/mocks/StubResultSet.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package com.zaxxer.hikari.performance;
+package com.zaxxer.hikari.mocks;
 
 import java.io.InputStream;
 import java.io.Reader;
@@ -78,7 +78,7 @@ public class StubResultSet implements ResultSet
     /** {@inheritDoc} */
     public String getString(int columnIndex) throws SQLException
     {
-        return null;
+        return "aString";
     }
 
     /** {@inheritDoc} */
diff --git a/src/test/java/com/zaxxer/hikari/performance/StubStatement.java b/src/test/java/com/zaxxer/hikari/mocks/StubStatement.java
similarity index 99%
rename from src/test/java/com/zaxxer/hikari/performance/StubStatement.java
rename to src/test/java/com/zaxxer/hikari/mocks/StubStatement.java
index 39e59e7c..88828ea1 100644
--- a/src/test/java/com/zaxxer/hikari/performance/StubStatement.java
+++ b/src/test/java/com/zaxxer/hikari/mocks/StubStatement.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package com.zaxxer.hikari.performance;
+package com.zaxxer.hikari.mocks;
 
 import java.sql.Connection;
 import java.sql.ResultSet;