diff --git a/gradle/dependencies.gradle b/gradle/dependencies.gradle
index eb1b7dd9c3..f8d85a7f73 100644
--- a/gradle/dependencies.gradle
+++ b/gradle/dependencies.gradle
@@ -6,7 +6,7 @@ def versions = [:]
 
 versions.bytebuddy = '1.11.0'
 versions.junitJupiter = '5.7.2'
-versions.errorprone = '2.6.0'
+versions.errorprone = '2.7.1'
 
 libraries.junit4 = 'junit:junit:4.13.2'
 libraries.junitJupiterApi = "org.junit.jupiter:junit-jupiter-api:${versions.junitJupiter}"
diff --git a/src/test/java/org/mockitousage/bugs/InheritedGenericsPolimorphicCallTest.java b/src/test/java/org/mockitousage/bugs/InheritedGenericsPolimorphicCallTest.java
index fed37f92b4..69cde9101c 100644
--- a/src/test/java/org/mockitousage/bugs/InheritedGenericsPolimorphicCallTest.java
+++ b/src/test/java/org/mockitousage/bugs/InheritedGenericsPolimorphicCallTest.java
@@ -43,7 +43,7 @@ public void shouldStubbingWork() {
 
     @Test
     public void shouldVerificationWorks() {
-        iterable.iterator();
+        MyIterator<String> unused = iterable.iterator();
 
         verify(iterable).iterator();
         verify((Iterable<String>) iterable).iterator();
@@ -70,8 +70,8 @@ public Object invoke(Object proxy, Method method, Object[] args)
                                 handler);
 
         // when
-        iterable.iterator();
-        ((Iterable<String>) iterable).iterator();
+        MyIterator<String> unused = iterable.iterator();
+        Iterator<String> unused2 = ((Iterable<String>) iterable).iterator();
 
         // then
         assertEquals(2, methods.size());
diff --git a/src/test/java/org/mockitousage/stubbing/StubbingWithCustomAnswerTest.java b/src/test/java/org/mockitousage/stubbing/StubbingWithCustomAnswerTest.java
index bbbaa8a077..5591bc47b5 100644
--- a/src/test/java/org/mockitousage/stubbing/StubbingWithCustomAnswerTest.java
+++ b/src/test/java/org/mockitousage/stubbing/StubbingWithCustomAnswerTest.java
@@ -40,7 +40,7 @@ public void shouldAnswerWithThenAnswerAlias() throws Exception {
         RecordCall recordCall = new RecordCall();
         Set<?> mockedSet = (Set<?>) when(mock(Set.class).isEmpty()).then(recordCall).getMock();
 
-        mockedSet.isEmpty();
+        boolean unused = mockedSet.isEmpty();
 
         assertTrue(recordCall.isCalled());
     }