diff --git a/validator/client/src/main/java/tech/pegasys/teku/validator/client/loader/ExternalUrlKeyReader.java b/validator/client/src/main/java/tech/pegasys/teku/validator/client/loader/ExternalUrlKeyReader.java
index ecaec67994b..08f1ad010d9 100644
--- a/validator/client/src/main/java/tech/pegasys/teku/validator/client/loader/ExternalUrlKeyReader.java
+++ b/validator/client/src/main/java/tech/pegasys/teku/validator/client/loader/ExternalUrlKeyReader.java
@@ -16,6 +16,7 @@
 import static tech.pegasys.teku.infrastructure.logging.StatusLogger.STATUS_LOG;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.annotations.VisibleForTesting;
 import java.io.IOException;
 import java.net.MalformedURLException;
 import java.net.URL;
@@ -58,7 +59,7 @@ public Stream<BLSPublicKey> readKeys() {
     return Arrays.stream(keys).map(key -> BLSPublicKey.fromSSZBytes(Bytes.fromHexString(key)));
   }
 
-  public SafeFuture<String[]> readUrl() {
+  private SafeFuture<String[]> readUrl() {
     try {
       return SafeFuture.completedFuture(mapper.readValue(new URL(url), String[].class));
     } catch (IOException e) {
@@ -66,7 +67,8 @@ public SafeFuture<String[]> readUrl() {
     }
   }
 
-  public SafeFuture<String[]> retry() {
+  @VisibleForTesting
+  SafeFuture<String[]> retry() {
     return asyncRunner
         .runWithRetry(
             () -> {
diff --git a/validator/client/src/test/java/tech/pegasys/teku/validator/client/loader/ExternalUrlKeyReaderTest.java b/validator/client/src/test/java/tech/pegasys/teku/validator/client/loader/ExternalUrlKeyReaderTest.java
index 36204032716..01f931f8b05 100644
--- a/validator/client/src/test/java/tech/pegasys/teku/validator/client/loader/ExternalUrlKeyReaderTest.java
+++ b/validator/client/src/test/java/tech/pegasys/teku/validator/client/loader/ExternalUrlKeyReaderTest.java
@@ -44,17 +44,18 @@
 class ExternalUrlKeyReaderTest {
   private static final Duration DELAY = Duration.ofSeconds(5);
   private static final String VALID_URL = "http://test:0000/api/v1/eth2/publicKeys";
-  private final ObjectMapper mapper = mock(ObjectMapper.class);
 
+  private final ObjectMapper mapper = mock(ObjectMapper.class);
   private final StubTimeProvider timeProvider = StubTimeProvider.withTimeInMillis(0);
   private final StubAsyncRunner asyncRunner = new StubAsyncRunner(timeProvider);
 
   private final DataStructureUtil dataStructureUtil =
       new DataStructureUtil(TestSpecFactory.createDefault());
 
-  final BLSPublicKey publicKey1 = dataStructureUtil.randomPublicKey();
-  final BLSPublicKey publicKey2 = dataStructureUtil.randomPublicKey();
-  final String[] expectedKeys = new String[] {publicKey1.toHexString(), publicKey2.toHexString()};
+  private final BLSPublicKey publicKey1 = dataStructureUtil.randomPublicKey();
+  private final BLSPublicKey publicKey2 = dataStructureUtil.randomPublicKey();
+  private final String[] expectedKeys =
+      new String[] {publicKey1.toHexString(), publicKey2.toHexString()};
 
   @Test
   void readKeys_validUrlReturnsValidKeys() throws IOException {