diff --git a/core/src/test/java/org/apache/iceberg/encryption/EncryptionTestHelpers.java b/core/src/test/java/org/apache/iceberg/encryption/EncryptionTestHelpers.java
index f1f59dac9f36..aa49e1c40fe2 100644
--- a/core/src/test/java/org/apache/iceberg/encryption/EncryptionTestHelpers.java
+++ b/core/src/test/java/org/apache/iceberg/encryption/EncryptionTestHelpers.java
@@ -24,6 +24,9 @@
 import org.apache.iceberg.relocated.com.google.common.collect.Maps;
 
 public class EncryptionTestHelpers {
+
+  private EncryptionTestHelpers() {}
+
   public static EncryptionManager createEncryptionManager() {
     Map<String, String> catalogProperties = Maps.newHashMap();
     catalogProperties.put(