diff --git a/caffeine/src/main/java/com/github/benmanes/caffeine/cache/BoundedLocalCache.java b/caffeine/src/main/java/com/github/benmanes/caffeine/cache/BoundedLocalCache.java
index 3d5d2314f2..20a71a3da1 100644
--- a/caffeine/src/main/java/com/github/benmanes/caffeine/cache/BoundedLocalCache.java
+++ b/caffeine/src/main/java/com/github/benmanes/caffeine/cache/BoundedLocalCache.java
@@ -3163,6 +3163,7 @@ <T> T expireAfterAccessOrder(boolean oldest, Function<@Nullable V, @Nullable V>
    * @param mappingFunction the mapping function to compute a value
    * @return the computed value
    */
+  @SuppressWarnings("NullAway")
   <T> T snapshot(Iterable<Node<K, V>> iterable, Function<@Nullable V, @Nullable V> transformer,
       Function<Stream<CacheEntry<K, V>>, T> mappingFunction) {
     requireNonNull(mappingFunction);
@@ -4009,6 +4010,7 @@ static final class BoundedPolicy<K, V> implements Policy<K, V> {
     @Override public @Nullable V getIfPresentQuietly(K key) {
       return transformer.apply(cache.getIfPresentQuietly(key));
     }
+    @SuppressWarnings("NullAway")
     @Override public @Nullable CacheEntry<K, V> getEntryIfPresentQuietly(K key) {
       Node<K, V> node = cache.data.get(cache.nodeFactory.newLookupKey(key));
       return (node == null) ? null : cache.nodeToCacheEntry(node, transformer);
diff --git a/caffeine/src/test/java/com/github/benmanes/caffeine/cache/BoundedLocalCacheTest.java b/caffeine/src/test/java/com/github/benmanes/caffeine/cache/BoundedLocalCacheTest.java
index 42d54382ab..a03be45ef8 100644
--- a/caffeine/src/test/java/com/github/benmanes/caffeine/cache/BoundedLocalCacheTest.java
+++ b/caffeine/src/test/java/com/github/benmanes/caffeine/cache/BoundedLocalCacheTest.java
@@ -998,8 +998,13 @@ public void evict_retired_victim(BoundedLocalCache<Int, Int> cache, CacheContext
 
   @Test(dataProvider = "caches")
   @CacheSpec(compute = Compute.SYNC, population = Population.EMPTY,
-      maximumSize = Maximum.FULL, weigher = CacheWeigher.VALUE)
+      maximumSize = Maximum.FULL, weigher = CacheWeigher.MOCKITO)
   public void evict_zeroWeight_candidate(BoundedLocalCache<Int, Int> cache, CacheContext context) {
+    when(context.weigher().weigh(any(), any())).thenAnswer(invocation -> {
+      Int value = invocation.getArgument(1);
+      return Math.abs(value.intValue());
+    });
+
     for (int i = 0; i < context.maximumSize(); i++) {
       assertThat(cache.put(Int.valueOf(i), Int.valueOf(1))).isNull();
     }
@@ -1019,8 +1024,13 @@ public void evict_zeroWeight_candidate(BoundedLocalCache<Int, Int> cache, CacheC
 
   @Test(dataProvider = "caches")
   @CacheSpec(compute = Compute.SYNC, population = Population.EMPTY,
-      maximumSize = Maximum.FULL, weigher = CacheWeigher.VALUE)
+      maximumSize = Maximum.FULL, weigher = CacheWeigher.MOCKITO)
   public void evict_zeroWeight_victim(BoundedLocalCache<Int, Int> cache, CacheContext context) {
+    when(context.weigher().weigh(any(), any())).thenAnswer(invocation -> {
+      Int value = invocation.getArgument(1);
+      return Math.abs(value.intValue());
+    });
+
     for (int i = 0; i < context.maximumSize(); i++) {
       assertThat(cache.put(Int.valueOf(i), Int.valueOf(1))).isNull();
     }
diff --git a/caffeine/src/test/java/com/github/benmanes/caffeine/cache/LinkedDequeSubject.java b/caffeine/src/test/java/com/github/benmanes/caffeine/cache/LinkedDequeSubject.java
index 209b281e48..b5bf5ed895 100644
--- a/caffeine/src/test/java/com/github/benmanes/caffeine/cache/LinkedDequeSubject.java
+++ b/caffeine/src/test/java/com/github/benmanes/caffeine/cache/LinkedDequeSubject.java
@@ -16,9 +16,12 @@
 package com.github.benmanes.caffeine.cache;
 
 import static com.google.common.truth.Truth.assertAbout;
+import static java.util.Objects.requireNonNull;
 
 import java.util.Iterator;
 
+import org.jspecify.annotations.Nullable;
+
 import com.github.benmanes.caffeine.testing.CollectionSubject;
 import com.google.common.collect.Sets;
 import com.google.common.truth.FailureMetadata;
@@ -29,10 +32,10 @@
  * @author ben.manes@gmail.com (Ben Manes)
  */
 final class LinkedDequeSubject extends CollectionSubject {
-  private final LinkedDeque<Object> actual;
+  private final @Nullable LinkedDeque<Object> actual;
 
   @SuppressWarnings("unchecked")
-  private LinkedDequeSubject(FailureMetadata metadata, LinkedDeque<?> subject) {
+  private LinkedDequeSubject(FailureMetadata metadata, @Nullable LinkedDeque<?> subject) {
     super(metadata, subject);
     this.actual = (LinkedDeque<Object>) subject;
   }
@@ -46,6 +49,7 @@ public static LinkedDequeSubject assertThat(LinkedDeque<?> actual) {
   }
 
   public void isValid() {
+    requireNonNull(actual);
     if (actual.isEmpty()) {
       isExhaustivelyEmpty();
     }
@@ -65,6 +69,7 @@ private void checkIterator(Iterator<?> iterator) {
   }
 
   private void checkElement(Object element) {
+    requireNonNull(actual);
     var first = actual.peekFirst();
     var last = actual.peekLast();
     if (element == first) {
diff --git a/caffeine/src/test/java/com/github/benmanes/caffeine/cache/LocalCacheSubject.java b/caffeine/src/test/java/com/github/benmanes/caffeine/cache/LocalCacheSubject.java
index e4163ad913..0ae9952b28 100644
--- a/caffeine/src/test/java/com/github/benmanes/caffeine/cache/LocalCacheSubject.java
+++ b/caffeine/src/test/java/com/github/benmanes/caffeine/cache/LocalCacheSubject.java
@@ -19,6 +19,7 @@
 import static com.github.benmanes.caffeine.testing.Awaits.await;
 import static com.github.benmanes.caffeine.testing.MapSubject.map;
 import static com.google.common.truth.Truth.assertThat;
+import static java.util.Objects.requireNonNull;
 
 import java.util.Collection;
 import java.util.Map;
@@ -26,6 +27,8 @@
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.TimeUnit;
 
+import org.jspecify.annotations.Nullable;
+
 import com.github.benmanes.caffeine.cache.Async.AsyncWeigher;
 import com.github.benmanes.caffeine.cache.BoundedLocalCache.BoundedLocalAsyncCache;
 import com.github.benmanes.caffeine.cache.BoundedLocalCache.BoundedLocalAsyncLoadingCache;
@@ -38,7 +41,7 @@
 import com.github.benmanes.caffeine.cache.UnboundedLocalCache.UnboundedLocalAsyncLoadingCache;
 import com.github.benmanes.caffeine.cache.UnboundedLocalCache.UnboundedLocalManualCache;
 import com.github.benmanes.caffeine.cache.stats.StatsCounter;
-import com.github.benmanes.caffeine.cache.testing.Weighers;
+import com.github.benmanes.caffeine.cache.testing.Weighers.SkippedWeigher;
 import com.google.common.collect.ImmutableTable;
 import com.google.common.collect.Sets;
 import com.google.common.truth.FailureMetadata;
@@ -52,9 +55,9 @@
  */
 @SuppressWarnings("GuardedBy")
 public final class LocalCacheSubject extends Subject {
-  private final Object actual;
+  private final @Nullable Object actual;
 
-  private LocalCacheSubject(FailureMetadata metadata, Object subject) {
+  private LocalCacheSubject(FailureMetadata metadata, @Nullable Object subject) {
     super(metadata, subject);
     this.actual = subject;
   }
@@ -73,6 +76,7 @@ private LocalCacheSubject(FailureMetadata metadata, Object subject) {
 
   @SuppressWarnings({"rawtypes", "unchecked"})
   public void isValid() {
+    requireNonNull(actual);
     if (actual instanceof BoundedLocalCache<?, ?>) {
       var bounded = (BoundedLocalCache<Object, Object>) actual;
       checkBounded(bounded);
@@ -298,11 +302,12 @@ private void checkLinks(BoundedLocalCache<Object, Object> bounded,
     long totalWeightedSize = 0;
     Set<Node<Object, Object>> seen = Sets.newIdentityHashSet();
     for (var cell : deques.cellSet()) {
-      long weightedSize = scanLinks(bounded, cell.getValue(), seen);
-      check("%s: %s in %s", cell.getRowKey(), cell.getValue(), bounded.data)
+      var deque = requireNonNull(cell.getValue());
+      long weightedSize = scanLinks(bounded, deque, seen);
+      check("%s: %s in %s", cell.getRowKey(), deque, bounded.data)
           .that(weightedSize).isEqualTo(cell.getColumnKey());
-      totalSize += cell.getValue().size();
       totalWeightedSize += weightedSize;
+      totalSize += deque.size();
     }
     check("linkSize").withMessage("cache.size() != links").that(bounded).hasSize(seen.size());
     check("totalSize").withMessage("cache.size() == deque.size()").that(bounded).hasSize(totalSize);
@@ -354,7 +359,7 @@ private void checkNode(BoundedLocalCache<Object, Object> bounded, Node<Object, O
   }
 
   private void checkKey(BoundedLocalCache<Object, Object> bounded,
-      Node<Object, Object> node, Object key, Object value) {
+      Node<Object, Object> node, @Nullable Object key, @Nullable Object value) {
     if (bounded.collectKeys()) {
       if ((key != null) && (value != null)) {
         check("bounded").that(bounded).containsKey(key);
@@ -368,10 +373,11 @@ private void checkKey(BoundedLocalCache<Object, Object> bounded,
   }
 
   private void checkValue(BoundedLocalCache<Object, Object> bounded,
-      Node<Object, Object> node, Object key, Object value) {
+      Node<Object, Object> node, @Nullable Object key, @Nullable Object value) {
     if (!bounded.collectValues()) {
       check("value").that(value).isNotNull();
       if ((key != null) && !bounded.hasExpired(node, bounded.expirationTicker().read())) {
+        requireNonNull(value);
         check("containsValue(value) for key %s", key)
             .about(map()).that(bounded).containsValue(value);
       }
@@ -379,7 +385,7 @@ private void checkValue(BoundedLocalCache<Object, Object> bounded,
     checkIfAsyncValue(value);
   }
 
-  private void checkIfAsyncValue(Object value) {
+  private void checkIfAsyncValue(@Nullable Object value) {
     if (value instanceof CompletableFuture<?>) {
       var future = (CompletableFuture<?>) value;
       if (!future.isDone() || future.isCompletedExceptionally()) {
@@ -390,18 +396,23 @@ private void checkIfAsyncValue(Object value) {
   }
 
   private void checkWeight(BoundedLocalCache<Object, Object> bounded,
-      Node<Object, Object> node, Object key, Object value) {
+      Node<Object, Object> node, @Nullable Object key, @Nullable Object value) {
     check("node.getWeight").that(node.getWeight()).isAtLeast(0);
+    if ((key == null) || (value == null)) {
+      return;
+    }
 
-    var weigher = bounded.weigher;
-    boolean canCheckWeight = (weigher == Weighers.random());
+    Weigher<?, ?> weigher = bounded.weigher;
     if (weigher instanceof AsyncWeigher) {
-      @SuppressWarnings("rawtypes")
-      var asyncWeigher = (AsyncWeigher) weigher;
-      canCheckWeight = (asyncWeigher.delegate == Weighers.random());
+      weigher = ((AsyncWeigher<?, ?>) weigher).delegate;
+    }
+    if (weigher instanceof BoundedWeigher) {
+      weigher = ((BoundedWeigher<?, ?>) weigher).delegate;
     }
-    if (canCheckWeight) {
-      check("node.getWeight()").that(node.getWeight()).isEqualTo(weigher.weigh(key, value));
+    if (!(weigher instanceof SkippedWeigher)) {
+      @SuppressWarnings("unchecked")
+      int weight = ((Weigher<Object, Object>) weigher).weigh(key, value);
+      check("node.getWeight()").that(node.getWeight()).isEqualTo(weight);
     }
   }
 
diff --git a/caffeine/src/test/java/com/github/benmanes/caffeine/cache/SchedulerTest.java b/caffeine/src/test/java/com/github/benmanes/caffeine/cache/SchedulerTest.java
index 5864fd7cc3..fd5b09fe90 100644
--- a/caffeine/src/test/java/com/github/benmanes/caffeine/cache/SchedulerTest.java
+++ b/caffeine/src/test/java/com/github/benmanes/caffeine/cache/SchedulerTest.java
@@ -125,6 +125,7 @@ public void disabledFuture_null() {
   /* --------------- guarded --------------- */
 
   @Test
+  @SuppressWarnings("NullAway")
   public void guardedScheduler_null() {
     assertThrows(NullPointerException.class, () -> Scheduler.guardedScheduler(null));
   }
@@ -166,6 +167,7 @@ public void guardedScheduler_exception() {
   /* --------------- ScheduledExecutorService --------------- */
 
   @Test
+  @SuppressWarnings("NullAway")
   public void scheduledExecutorService_null() {
     assertThrows(NullPointerException.class, () -> Scheduler.forScheduledExecutorService(null));
   }
diff --git a/caffeine/src/test/java/com/github/benmanes/caffeine/cache/testing/CacheSpec.java b/caffeine/src/test/java/com/github/benmanes/caffeine/cache/testing/CacheSpec.java
index 69f6cfa86c..c9b5be5b01 100644
--- a/caffeine/src/test/java/com/github/benmanes/caffeine/cache/testing/CacheSpec.java
+++ b/caffeine/src/test/java/com/github/benmanes/caffeine/cache/testing/CacheSpec.java
@@ -54,6 +54,7 @@
 import com.github.benmanes.caffeine.cache.Scheduler;
 import com.github.benmanes.caffeine.cache.Weigher;
 import com.github.benmanes.caffeine.cache.testing.RemovalListeners.ConsumingRemovalListener;
+import com.github.benmanes.caffeine.cache.testing.Weighers.SkippedWeigher;
 import com.github.benmanes.caffeine.testing.ConcurrentTestHarness;
 import com.github.benmanes.caffeine.testing.Int;
 import com.google.common.collect.Maps;
@@ -198,12 +199,18 @@ enum CacheWeigher {
     VALUE(() -> (key, value) -> Math.abs(((Int) value).intValue())),
     /** A flag indicating that the entry is weighted by the value's collection size. */
     COLLECTION(() -> (key, value) -> ((Collection<?>) value).size()),
-    /** A flag indicating that the entry's weight is randomly changing. */
+    /**
+     * A flag indicating that the entry's weight is randomly changing and is skipped by automatic
+     * validation checks.
+     */
     RANDOM(Weighers::random),
-    /** A flag indicating that the entry's weight records interactions. */
+    /**
+     * A flag indicating that the entry's weight records interactions and is skipped by automatic
+     * automatic validation checks.
+     */
     @SuppressWarnings("unchecked")
     MOCKITO(() -> {
-      Weigher<Object, Object> weigher = Mockito.mock();
+      SkippedWeigher<Object, Object> weigher = Mockito.mock();
       when(weigher.weigh(any(), any())).thenReturn(1);
       return weigher;
     });
diff --git a/caffeine/src/test/java/com/github/benmanes/caffeine/cache/testing/Weighers.java b/caffeine/src/test/java/com/github/benmanes/caffeine/cache/testing/Weighers.java
index d1897c0354..b065f56cb7 100644
--- a/caffeine/src/test/java/com/github/benmanes/caffeine/cache/testing/Weighers.java
+++ b/caffeine/src/test/java/com/github/benmanes/caffeine/cache/testing/Weighers.java
@@ -42,6 +42,9 @@ public static <K, V> Weigher<K, V> random() {
     return (Weigher<K, V>) RandomWeigher.INSTANCE;
   }
 
+  /** A marker to instruct the validation to not check the entry's weight. */
+  public interface SkippedWeigher<K, V> extends Weigher<K, V> {}
+
   static final class ConstantWeigher<K, V> implements Weigher<K, V>, Serializable {
     private static final long serialVersionUID = 1L;
 
@@ -57,7 +60,7 @@ static final class ConstantWeigher<K, V> implements Weigher<K, V>, Serializable
     }
   }
 
-  enum RandomWeigher implements Weigher<Object, Object> {
+  enum RandomWeigher implements SkippedWeigher<Object, Object> {
     INSTANCE;
 
     @Override public int weigh(Object key, Object value) {
diff --git a/caffeine/src/test/java/com/github/benmanes/caffeine/eclipse/acceptance/ConcurrentHashMapAcceptanceTest.java b/caffeine/src/test/java/com/github/benmanes/caffeine/eclipse/acceptance/ConcurrentHashMapAcceptanceTest.java
index e9addaf1a2..780306989a 100644
--- a/caffeine/src/test/java/com/github/benmanes/caffeine/eclipse/acceptance/ConcurrentHashMapAcceptanceTest.java
+++ b/caffeine/src/test/java/com/github/benmanes/caffeine/eclipse/acceptance/ConcurrentHashMapAcceptanceTest.java
@@ -25,6 +25,7 @@
 import org.eclipse.collections.impl.list.Interval;
 import org.eclipse.collections.impl.parallel.ParallelIterate;
 import org.eclipse.collections.impl.test.Verify;
+import org.jspecify.annotations.NullUnmarked;
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
@@ -35,6 +36,7 @@
  *
  * Ported from Eclipse Collections 11.0.
  */
+@NullUnmarked
 @SuppressWarnings("CanIgnoreReturnValueSuggester")
 public abstract class ConcurrentHashMapAcceptanceTest {
   private ExecutorService executor;
diff --git a/caffeine/src/test/java/com/github/benmanes/caffeine/testing/CollectionSubject.java b/caffeine/src/test/java/com/github/benmanes/caffeine/testing/CollectionSubject.java
index 8dc625538e..e1f8dcefff 100644
--- a/caffeine/src/test/java/com/github/benmanes/caffeine/testing/CollectionSubject.java
+++ b/caffeine/src/test/java/com/github/benmanes/caffeine/testing/CollectionSubject.java
@@ -17,6 +17,7 @@
 
 import static com.google.common.base.Preconditions.checkArgument;
 import static com.google.common.truth.Truth.assertAbout;
+import static java.util.Objects.requireNonNull;
 
 import java.util.Collection;
 import java.util.Deque;
@@ -25,6 +26,8 @@
 import java.util.Queue;
 import java.util.Set;
 
+import org.jspecify.annotations.Nullable;
+
 import com.google.common.truth.FailureMetadata;
 import com.google.common.truth.IterableSubject;
 
@@ -34,9 +37,9 @@
  * @author ben.manes@gmail.com (Ben Manes)
  */
 public class CollectionSubject extends IterableSubject {
-  private final Collection<?> actual;
+  private final @Nullable Collection<?> actual;
 
-  public CollectionSubject(FailureMetadata metadata, Collection<?> subject) {
+  public CollectionSubject(FailureMetadata metadata, @Nullable Collection<?> subject) {
     super(metadata, subject);
     this.actual = subject;
   }
@@ -56,6 +59,7 @@ public final void hasSize(long expectedSize) {
 
   /** Fails if the collection does not have less than the given size. */
   public void hasSizeLessThan(long other) {
+    requireNonNull(actual);
     checkArgument(other >= 0, "expectedSize (%s) must be >= 0", other);
     check("size()").that(actual.size()).isLessThan(Math.toIntExact(other));
   }
@@ -68,6 +72,7 @@ public void hasSizeLessThan(long other) {
   public void isExhaustivelyEmpty() {
     checkIterable();
     checkCollection();
+    requireNonNull(actual);
     if (actual instanceof Set<?>) {
       checkSet((Set<?>) actual);
     }
@@ -83,11 +88,13 @@ public void isExhaustivelyEmpty() {
   }
 
   private void checkIterable() {
+    requireNonNull(actual);
     check("iterator().hasNext()").that(actual.iterator().hasNext()).isFalse();
   }
 
   @SuppressWarnings("CollectionToArray")
   private void checkCollection() {
+    requireNonNull(actual);
     check("size()").that(actual).hasSize(0);
     check("isEmpty()").that(actual).isEmpty();
     check("toArray()").that(actual.toArray()).isEmpty();
diff --git a/caffeine/src/test/java/com/github/benmanes/caffeine/testing/LoggingEvents.java b/caffeine/src/test/java/com/github/benmanes/caffeine/testing/LoggingEvents.java
index 4b793c3624..cd1b19bcc3 100644
--- a/caffeine/src/test/java/com/github/benmanes/caffeine/testing/LoggingEvents.java
+++ b/caffeine/src/test/java/com/github/benmanes/caffeine/testing/LoggingEvents.java
@@ -25,6 +25,7 @@
 import java.util.Objects;
 import java.util.function.Predicate;
 
+import org.jspecify.annotations.Nullable;
 import org.slf4j.event.Level;
 
 import com.github.valfirst.slf4jtest.LoggingEvent;
@@ -43,7 +44,8 @@ public final class LoggingEvents extends ForwardingList<LoggingEvent> {
   private final List<Predicate<LoggingEvent>> predicates;
   private final ImmutableList<LoggingEvent> events;
 
-  private ImmutableList<LoggingEvent> filteredEvents;
+  private @Nullable ImmutableList<LoggingEvent> filteredEvents;
+
   private boolean exclusive;
 
   private LoggingEvents(Iterable<LoggingEvent> events) {
diff --git a/caffeine/src/test/java/com/github/benmanes/caffeine/testing/MapSubject.java b/caffeine/src/test/java/com/github/benmanes/caffeine/testing/MapSubject.java
index 32c767e4da..527c755a77 100644
--- a/caffeine/src/test/java/com/github/benmanes/caffeine/testing/MapSubject.java
+++ b/caffeine/src/test/java/com/github/benmanes/caffeine/testing/MapSubject.java
@@ -18,9 +18,12 @@
 import static com.github.benmanes.caffeine.testing.CollectionSubject.collection;
 import static com.google.common.base.Preconditions.checkArgument;
 import static com.google.common.truth.Truth.assertAbout;
+import static java.util.Objects.requireNonNull;
 
 import java.util.Map;
 
+import org.jspecify.annotations.Nullable;
+
 import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.Range;
 import com.google.common.truth.FailureMetadata;
@@ -34,9 +37,9 @@
  */
 public class MapSubject extends com.google.common.truth.MapSubject {
   @SuppressWarnings("ImmutableMemberCollection")
-  private final Map<?, ?> actual;
+  private final @Nullable Map<?, ?> actual;
 
-  public MapSubject(FailureMetadata metadata, Map<?, ?> subject) {
+  public MapSubject(FailureMetadata metadata, @Nullable Map<?, ?> subject) {
     super(metadata, subject);
     this.actual = subject;
   }
@@ -56,29 +59,34 @@ public final void hasSize(long expectedSize) {
 
   /** Fails if the map does not have less than the given size. */
   public void hasSizeLessThan(long other) {
+    requireNonNull(actual);
     checkArgument(other >= 0, "expectedSize (%s) must be >= 0", other);
     check("size()").that(actual.size()).isLessThan(Math.toIntExact(other));
   }
 
   /** Fails if the map's size is not in {@code range}. */
   public void hasSizeIn(Range<Integer> range) {
+    requireNonNull(actual);
     check("size()").that(actual.size()).isIn(range);
   }
 
   /** Fails if the map does not contain the given keys, where duplicate keys are ignored. */
   @CanIgnoreReturnValue
   public Ordered containsExactlyKeys(Iterable<?> keys) {
+    requireNonNull(actual);
     return check("containsKeys").that(actual.keySet())
         .containsExactlyElementsIn(ImmutableSet.copyOf(keys));
   }
 
   /** Fails if the map does not contain the given value. */
   public void containsValue(Object value) {
+    requireNonNull(actual);
     check("containsValue").that(actual.values()).contains(value);
   }
 
   /** Fails if the map does contain the given value. */
   public void doesNotContainValue(Object value) {
+    requireNonNull(actual);
     check("containsValue").that(actual.values()).doesNotContain(value);
   }
 
@@ -87,6 +95,7 @@ public void doesNotContainValue(Object value) {
    * methods.
    */
   public void isExhaustivelyEmpty() {
+    requireNonNull(actual);
     isEqualTo(Map.of());
     hasSize(0);
     isEmpty();
diff --git a/examples/coalescing-bulkloader-reactor/gradle/libs.versions.toml b/examples/coalescing-bulkloader-reactor/gradle/libs.versions.toml
index 8ccad706c3..85ee0daab6 100644
--- a/examples/coalescing-bulkloader-reactor/gradle/libs.versions.toml
+++ b/examples/coalescing-bulkloader-reactor/gradle/libs.versions.toml
@@ -1,7 +1,7 @@
 [versions]
 caffeine = "3.1.8"
 junit = "5.11.3"
-reactor = "3.7.0"
+reactor = "3.7.1"
 truth = "1.4.4"
 versions = "0.51.0"
 
diff --git a/examples/coalescing-bulkloader-reactor/gradle/wrapper/gradle-wrapper.properties b/examples/coalescing-bulkloader-reactor/gradle/wrapper/gradle-wrapper.properties
index 0cdabcd31b..c085078342 100644
--- a/examples/coalescing-bulkloader-reactor/gradle/wrapper/gradle-wrapper.properties
+++ b/examples/coalescing-bulkloader-reactor/gradle/wrapper/gradle-wrapper.properties
@@ -1,4 +1,4 @@
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-rc-1-bin.zip
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
diff --git a/examples/coalescing-bulkloader-reactor/settings.gradle.kts b/examples/coalescing-bulkloader-reactor/settings.gradle.kts
index 149babf6c3..53023a7268 100644
--- a/examples/coalescing-bulkloader-reactor/settings.gradle.kts
+++ b/examples/coalescing-bulkloader-reactor/settings.gradle.kts
@@ -1,5 +1,5 @@
 plugins {
-  id("com.gradle.develocity") version "3.18.2"
+  id("com.gradle.develocity") version "3.19"
   id("com.gradle.common-custom-user-data-gradle-plugin") version "2.0.2"
   id("org.gradle.toolchains.foojay-resolver-convention") version "0.8.0"
 }
diff --git a/examples/graal-native/gradle/wrapper/gradle-wrapper.properties b/examples/graal-native/gradle/wrapper/gradle-wrapper.properties
index 0cdabcd31b..c085078342 100644
--- a/examples/graal-native/gradle/wrapper/gradle-wrapper.properties
+++ b/examples/graal-native/gradle/wrapper/gradle-wrapper.properties
@@ -1,4 +1,4 @@
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-rc-1-bin.zip
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
diff --git a/examples/graal-native/settings.gradle.kts b/examples/graal-native/settings.gradle.kts
index a5e4cd278c..1bb26f570f 100644
--- a/examples/graal-native/settings.gradle.kts
+++ b/examples/graal-native/settings.gradle.kts
@@ -5,7 +5,7 @@ pluginManagement {
   }
 }
 plugins {
-  id("com.gradle.develocity") version "3.18.2"
+  id("com.gradle.develocity") version "3.19"
   id("com.gradle.common-custom-user-data-gradle-plugin") version "2.0.2"
   id("org.gradle.toolchains.foojay-resolver-convention") version "0.8.0"
 }
diff --git a/examples/hibernate/gradle/wrapper/gradle-wrapper.properties b/examples/hibernate/gradle/wrapper/gradle-wrapper.properties
index 0cdabcd31b..c085078342 100644
--- a/examples/hibernate/gradle/wrapper/gradle-wrapper.properties
+++ b/examples/hibernate/gradle/wrapper/gradle-wrapper.properties
@@ -1,4 +1,4 @@
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-rc-1-bin.zip
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
diff --git a/examples/hibernate/settings.gradle.kts b/examples/hibernate/settings.gradle.kts
index 8a0dbec0f9..a6fd48777d 100644
--- a/examples/hibernate/settings.gradle.kts
+++ b/examples/hibernate/settings.gradle.kts
@@ -1,5 +1,5 @@
 plugins {
-  id("com.gradle.develocity") version "3.18.2"
+  id("com.gradle.develocity") version "3.19"
   id("com.gradle.common-custom-user-data-gradle-plugin") version "2.0.2"
   id("org.gradle.toolchains.foojay-resolver-convention") version "0.8.0"
 }
diff --git a/examples/indexable/gradle/wrapper/gradle-wrapper.properties b/examples/indexable/gradle/wrapper/gradle-wrapper.properties
index 0cdabcd31b..c085078342 100644
--- a/examples/indexable/gradle/wrapper/gradle-wrapper.properties
+++ b/examples/indexable/gradle/wrapper/gradle-wrapper.properties
@@ -1,4 +1,4 @@
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-rc-1-bin.zip
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
diff --git a/examples/indexable/settings.gradle.kts b/examples/indexable/settings.gradle.kts
index e17d97cef9..58d363260e 100644
--- a/examples/indexable/settings.gradle.kts
+++ b/examples/indexable/settings.gradle.kts
@@ -1,5 +1,5 @@
 plugins {
-  id("com.gradle.develocity") version "3.18.2"
+  id("com.gradle.develocity") version "3.19"
   id("com.gradle.common-custom-user-data-gradle-plugin") version "2.0.2"
   id("org.gradle.toolchains.foojay-resolver-convention") version "0.8.0"
 }
diff --git a/examples/resilience-failsafe/gradle/wrapper/gradle-wrapper.properties b/examples/resilience-failsafe/gradle/wrapper/gradle-wrapper.properties
index 0cdabcd31b..c085078342 100644
--- a/examples/resilience-failsafe/gradle/wrapper/gradle-wrapper.properties
+++ b/examples/resilience-failsafe/gradle/wrapper/gradle-wrapper.properties
@@ -1,4 +1,4 @@
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-rc-1-bin.zip
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
diff --git a/examples/resilience-failsafe/settings.gradle.kts b/examples/resilience-failsafe/settings.gradle.kts
index 0ddb809517..090e9af4ed 100644
--- a/examples/resilience-failsafe/settings.gradle.kts
+++ b/examples/resilience-failsafe/settings.gradle.kts
@@ -1,5 +1,5 @@
 plugins {
-  id("com.gradle.develocity") version "3.18.2"
+  id("com.gradle.develocity") version "3.19"
   id("com.gradle.common-custom-user-data-gradle-plugin") version "2.0.2"
   id("org.gradle.toolchains.foojay-resolver-convention") version "0.8.0"
 }
diff --git a/examples/write-behind-rxjava/gradle/wrapper/gradle-wrapper.properties b/examples/write-behind-rxjava/gradle/wrapper/gradle-wrapper.properties
index 0cdabcd31b..c085078342 100644
--- a/examples/write-behind-rxjava/gradle/wrapper/gradle-wrapper.properties
+++ b/examples/write-behind-rxjava/gradle/wrapper/gradle-wrapper.properties
@@ -1,4 +1,4 @@
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-rc-1-bin.zip
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
diff --git a/examples/write-behind-rxjava/settings.gradle.kts b/examples/write-behind-rxjava/settings.gradle.kts
index d04c4ad195..c288943379 100644
--- a/examples/write-behind-rxjava/settings.gradle.kts
+++ b/examples/write-behind-rxjava/settings.gradle.kts
@@ -1,5 +1,5 @@
 plugins {
-  id("com.gradle.develocity") version "3.18.2"
+  id("com.gradle.develocity") version "3.19"
   id("com.gradle.common-custom-user-data-gradle-plugin") version "2.0.2"
   id("org.gradle.toolchains.foojay-resolver-convention") version "0.8.0"
 }
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index fa913b441d..46773c3b27 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -7,14 +7,14 @@ bnd = "7.1.0"
 bouncycastle-jdk18on = "1.79"
 cache2k = "2.6.1.Final"
 caffeine = "3.1.8"
-checkstyle = "10.20.2"
+checkstyle = "10.21.0"
 coherence = "24.09"
 commons-collections4 = "4.4"
 commons-compress = "1.27.1"
 commons-io = "2.18.0"
 commons-lang3 = "3.17.0"
 commons-math3 = "3.6.1"
-commons-text = "1.12.0"
+commons-text = "1.13.0"
 concurrentlinkedhashmap = "1.4.2"
 config = "1.4.3"
 coveralls = "2.12.2"
@@ -32,7 +32,7 @@ felix-scr = "2.2.12"
 findsecbugs = "1.13.0"
 flip-tables = "1.1.1"
 forbidden-apis = "3.8"
-google-java-format = "1.25.0"
+google-java-format = "1.25.2"
 guava = "33.3.1-jre"
 guice = "6.0.0"
 h2 = "2.3.232"
@@ -68,7 +68,7 @@ kotlin = "2.1.0"
 lincheck = "2.34"
 mockito = "5.14.2"
 nexus-publish = "2.0.0"
-nullaway = "0.12.1"
+nullaway = "0.12.2"
 nullaway-plugin = "2.1.0"
 okhttp-bom = "4.12.0"
 okio-bom = "3.9.1"
diff --git a/gradle/plugins/settings.gradle.kts b/gradle/plugins/settings.gradle.kts
index 613c7e28ec..c8e64b1f28 100644
--- a/gradle/plugins/settings.gradle.kts
+++ b/gradle/plugins/settings.gradle.kts
@@ -1,5 +1,5 @@
 plugins {
-  id("com.gradle.develocity") version "3.18.2"
+  id("com.gradle.develocity") version "3.19"
   id("com.gradle.common-custom-user-data-gradle-plugin") version "2.0.2"
   id("org.gradle.toolchains.foojay-resolver-convention") version "0.8.0"
 }
diff --git a/gradle/plugins/src/main/kotlin/quality/errorprone.caffeine.gradle.kts b/gradle/plugins/src/main/kotlin/quality/errorprone.caffeine.gradle.kts
index 115c71bedc..a71aa47639 100644
--- a/gradle/plugins/src/main/kotlin/quality/errorprone.caffeine.gradle.kts
+++ b/gradle/plugins/src/main/kotlin/quality/errorprone.caffeine.gradle.kts
@@ -66,6 +66,8 @@ tasks.withType<JavaCompile>().configureEach {
       nullaway {
         if (name.contains("Test")) {
           disable()
+        } else {
+          error()
         }
         annotatedPackages.add("com.github.benmanes.caffeine")
         annotatedPackages.add("com.google.common")
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 0cdabcd31b..c085078342 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,4 +1,4 @@
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-rc-1-bin.zip
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
diff --git a/settings.gradle.kts b/settings.gradle.kts
index cab1d2d545..451101b3ab 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -2,9 +2,9 @@ pluginManagement {
   includeBuild("gradle/plugins")
 }
 plugins {
-  id("com.gradle.develocity") version "3.18.2"
+  id("com.gradle.develocity") version "3.19"
   id("com.gradle.common-custom-user-data-gradle-plugin") version "2.0.2"
-  id("org.gradle.toolchains.foojay-resolver-convention") version "0.8.0"
+  id("org.gradle.toolchains.foojay-resolver-convention") version "0.9.0"
 }
 
 dependencyResolutionManagement {