diff --git a/gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/api/accounts/AccountIT.java b/gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/api/accounts/AccountIT.java
index 1c5f178..5fbf8ca 100644
--- a/gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/api/accounts/AccountIT.java
+++ b/gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/api/accounts/AccountIT.java
@@ -1174,7 +1174,6 @@
     assertThat(actual.fingerprint)
         .named(id)
         .isEqualTo(Fingerprint.toString(expected.getPublicKey().getFingerprint()));
-    @SuppressWarnings("unchecked")
     List<String> userIds = ImmutableList.copyOf(expected.getPublicKey().getUserIDs());
     assertThat(actual.userIds).named(id).containsExactlyElementsIn(userIds);
     assertThat(actual.key).named(id).startsWith("-----BEGIN PGP PUBLIC KEY BLOCK-----\n");
diff --git a/gerrit-gpg/src/main/java/com/google/gerrit/gpg/GerritPublicKeyChecker.java b/gerrit-gpg/src/main/java/com/google/gerrit/gpg/GerritPublicKeyChecker.java
index b0429cb..ffedcfb 100644
--- a/gerrit-gpg/src/main/java/com/google/gerrit/gpg/GerritPublicKeyChecker.java
+++ b/gerrit-gpg/src/main/java/com/google/gerrit/gpg/GerritPublicKeyChecker.java
@@ -176,7 +176,6 @@
 
   private boolean hasAllowedUserId(PGPPublicKey key, Set<String> allowedUserIds)
       throws PGPException {
-    @SuppressWarnings("unchecked")
     Iterator<String> userIds = key.getUserIDs();
     while (userIds.hasNext()) {
       String userId = userIds.next();
diff --git a/gerrit-gpg/src/main/java/com/google/gerrit/gpg/PublicKeyChecker.java b/gerrit-gpg/src/main/java/com/google/gerrit/gpg/PublicKeyChecker.java
index c0ab26c..70e9a24 100644
--- a/gerrit-gpg/src/main/java/com/google/gerrit/gpg/PublicKeyChecker.java
+++ b/gerrit-gpg/src/main/java/com/google/gerrit/gpg/PublicKeyChecker.java
@@ -381,7 +381,6 @@
     }
 
     List<CheckResult> signerResults = new ArrayList<>();
-    @SuppressWarnings("unchecked")
     Iterator<String> userIds = key.getUserIDs();
     while (userIds.hasNext()) {
       String userId = userIds.next();
diff --git a/gerrit-gpg/src/main/java/com/google/gerrit/gpg/PublicKeyStore.java b/gerrit-gpg/src/main/java/com/google/gerrit/gpg/PublicKeyStore.java
index 144606a..8ab5fbd 100644
--- a/gerrit-gpg/src/main/java/com/google/gerrit/gpg/PublicKeyStore.java
+++ b/gerrit-gpg/src/main/java/com/google/gerrit/gpg/PublicKeyStore.java
@@ -398,7 +398,6 @@
   }
 
   public static String keyToString(PGPPublicKey key) {
-    @SuppressWarnings("unchecked")
     Iterator<String> it = key.getUserIDs();
     return String.format(
         "%s %s(%s)",
diff --git a/gerrit-gpg/src/main/java/com/google/gerrit/gpg/server/GpgKeys.java b/gerrit-gpg/src/main/java/com/google/gerrit/gpg/server/GpgKeys.java
index 678247e..303499e 100644
--- a/gerrit-gpg/src/main/java/com/google/gerrit/gpg/server/GpgKeys.java
+++ b/gerrit-gpg/src/main/java/com/google/gerrit/gpg/server/GpgKeys.java
@@ -219,7 +219,6 @@
     if (key != null) {
       info.id = PublicKeyStore.keyIdToString(key.getKeyID());
       info.fingerprint = Fingerprint.toString(key.getFingerprint());
-      @SuppressWarnings("unchecked")
       Iterator<String> userIds = key.getUserIDs();
       info.userIds = ImmutableList.copyOf(userIds);
 
diff --git a/gerrit-gpg/src/test/java/com/google/gerrit/gpg/GerritPublicKeyCheckerTest.java b/gerrit-gpg/src/test/java/com/google/gerrit/gpg/GerritPublicKeyCheckerTest.java
index 64311e0..524af50 100644
--- a/gerrit-gpg/src/test/java/com/google/gerrit/gpg/GerritPublicKeyCheckerTest.java
+++ b/gerrit-gpg/src/test/java/com/google/gerrit/gpg/GerritPublicKeyCheckerTest.java
@@ -374,7 +374,7 @@
 
     PGPPublicKeyRing keyRingB = keyB().getPublicKeyRing();
     PGPPublicKey keyB = keyRingB.getPublicKey();
-    keyB = PGPPublicKey.removeCertification(keyB, (String) keyB.getUserIDs().next());
+    keyB = PGPPublicKey.removeCertification(keyB, keyB.getUserIDs().next());
     keyRingB = PGPPublicKeyRing.insertPublicKey(keyRingB, keyB);
     add(keyRingB, addUser("userB"));
 
@@ -392,8 +392,7 @@
     List<ExternalId> newExtIds = new ArrayList<>(2);
     newExtIds.add(ExternalId.create(toExtIdKey(kr.getPublicKey()), id));
 
-    @SuppressWarnings("unchecked")
-    String userId = (String) Iterators.getOnlyElement(kr.getPublicKey().getUserIDs(), null);
+    String userId = Iterators.getOnlyElement(kr.getPublicKey().getUserIDs(), null);
     if (userId != null) {
       String email = PushCertificateIdent.parse(userId).getEmailAddress();
       assertThat(email).contains("@");
diff --git a/gerrit-gpg/src/test/java/com/google/gerrit/gpg/PublicKeyStoreTest.java b/gerrit-gpg/src/test/java/com/google/gerrit/gpg/PublicKeyStoreTest.java
index c9c0b18..94eff06 100644
--- a/gerrit-gpg/src/test/java/com/google/gerrit/gpg/PublicKeyStoreTest.java
+++ b/gerrit-gpg/src/test/java/com/google/gerrit/gpg/PublicKeyStoreTest.java
@@ -231,7 +231,6 @@
 
   private void assertUserIds(PGPPublicKeyRing keyRing, String... expected) throws Exception {
     List<String> actual = new ArrayList<>();
-    @SuppressWarnings("unchecked")
     Iterator<String> userIds =
         store.get(keyRing.getPublicKey().getKeyID()).iterator().next().getPublicKey().getUserIDs();
     while (userIds.hasNext()) {
diff --git a/gerrit-gpg/src/test/java/com/google/gerrit/gpg/testutil/TestKey.java b/gerrit-gpg/src/test/java/com/google/gerrit/gpg/testutil/TestKey.java
index 420dedf..b2ef65d 100644
--- a/gerrit-gpg/src/test/java/com/google/gerrit/gpg/testutil/TestKey.java
+++ b/gerrit-gpg/src/test/java/com/google/gerrit/gpg/testutil/TestKey.java
@@ -77,7 +77,7 @@
   }
 
   public String getFirstUserId() {
-    return (String) getPublicKey().getUserIDs().next();
+    return getPublicKey().getUserIDs().next();
   }
 
   public PGPPrivateKey getPrivateKey() throws PGPException {