diff --git a/java/com/google/gerrit/server/git/MultiProgressMonitor.java b/java/com/google/gerrit/server/git/MultiProgressMonitor.java
index 52a34d96b71e..290e1e7972f9 100644
--- a/java/com/google/gerrit/server/git/MultiProgressMonitor.java
+++ b/java/com/google/gerrit/server/git/MultiProgressMonitor.java
@@ -249,6 +249,7 @@ MultiProgressMonitor create(
    * @param out stream for writing progress messages.
    * @param taskName name of the overall task.
    */
+  @SuppressWarnings("UnusedMethod")
   @AssistedInject
   private MultiProgressMonitor(
       CancellationMetrics cancellationMetrics,
diff --git a/java/com/google/gerrit/server/notedb/ChangeDraftUpdate.java b/java/com/google/gerrit/server/notedb/ChangeDraftUpdate.java
index 5d19205a90eb..73161d7e380a 100644
--- a/java/com/google/gerrit/server/notedb/ChangeDraftUpdate.java
+++ b/java/com/google/gerrit/server/notedb/ChangeDraftUpdate.java
@@ -92,6 +92,7 @@ private static Key key(HumanComment c) {
   private List<HumanComment> put = new ArrayList<>();
   private Map<Key, DeleteReason> delete = new HashMap<>();
 
+  @SuppressWarnings("UnusedMethod")
   @AssistedInject
   private ChangeDraftUpdate(
       @GerritPersonIdent PersonIdent serverIdent,
diff --git a/java/com/google/gerrit/server/notedb/ChangeUpdate.java b/java/com/google/gerrit/server/notedb/ChangeUpdate.java
index e7de644bec6f..85bb445ae531 100644
--- a/java/com/google/gerrit/server/notedb/ChangeUpdate.java
+++ b/java/com/google/gerrit/server/notedb/ChangeUpdate.java
@@ -181,6 +181,7 @@ ChangeUpdate create(
   private DeleteChangeMessageRewriter deleteChangeMessageRewriter;
   private List<SubmitRequirementResult> submitRequirementResults;
 
+  @SuppressWarnings("UnusedMethod")
   @AssistedInject
   private ChangeUpdate(
       @GerritPersonIdent PersonIdent serverIdent,
diff --git a/java/com/google/gerrit/server/notedb/RobotCommentUpdate.java b/java/com/google/gerrit/server/notedb/RobotCommentUpdate.java
index edf5bd36cb09..7f067f569b66 100644
--- a/java/com/google/gerrit/server/notedb/RobotCommentUpdate.java
+++ b/java/com/google/gerrit/server/notedb/RobotCommentUpdate.java
@@ -69,6 +69,7 @@ RobotCommentUpdate create(
 
   private List<RobotComment> put = new ArrayList<>();
 
+  @SuppressWarnings("UnusedMethod")
   @AssistedInject
   private RobotCommentUpdate(
       @GerritPersonIdent PersonIdent serverIdent,
@@ -81,6 +82,7 @@ private RobotCommentUpdate(
     super(noteUtil, serverIdent, notes, null, accountId, realAccountId, authorIdent, when);
   }
 
+  @SuppressWarnings("UnusedMethod")
   @AssistedInject
   private RobotCommentUpdate(
       @GerritPersonIdent PersonIdent serverIdent,
diff --git a/java/com/google/gerrit/server/rules/PrologRuleEvaluator.java b/java/com/google/gerrit/server/rules/PrologRuleEvaluator.java
index ddc3fcafedeb..cab5b458ce7c 100644
--- a/java/com/google/gerrit/server/rules/PrologRuleEvaluator.java
+++ b/java/com/google/gerrit/server/rules/PrologRuleEvaluator.java
@@ -98,6 +98,7 @@ private static class UserTermExpected extends Exception {
   private final PrologOptions opts;
   private Term submitRule;
 
+  @SuppressWarnings("UnusedMethod")
   @AssistedInject
   private PrologRuleEvaluator(
       AccountCache accountCache,