diff --git a/buildSrc/src/main/kotlin/Dependencies.kt b/buildSrc/src/main/kotlin/Dependencies.kt
index 4b90be1..1c9fc52 100644
--- a/buildSrc/src/main/kotlin/Dependencies.kt
+++ b/buildSrc/src/main/kotlin/Dependencies.kt
@@ -5,7 +5,8 @@ object Versions {
     const val ANDROID_GRADLE_PLUGIN = "7.4.2"
     const val JUNIT = "4.13.2"
     const val ROBOLECTRIC = "4.10.3"
-    const val MOCKITO = "4.11.0"
+    const val MOCKITO = "5.5.0"
+    const val MOCKITO_INLINE = "5.2.0"
     const val MOCKITO_KOTLIN = "4.1.0"
     const val CORE_KTX = "1.6.0"
     const val FRAGMENT_KTX = "1.2.4"
@@ -38,7 +39,7 @@ object Libs {
     const val CORE_KTX = "androidx.core:core-ktx:${Versions.CORE_KTX}"
     const val KOTLIN_TESTS = "org.jetbrains.kotlin:kotlin-test:${Versions.KOTLIN}"
     const val FRAGMENT_KTX = "androidx.fragment:fragment-ktx:${Versions.FRAGMENT_KTX}"
-    const val MOCKITO_INLINE = "org.mockito:mockito-inline:${Versions.MOCKITO}"
+    const val MOCKITO_INLINE = "org.mockito:mockito-inline:${Versions.MOCKITO_INLINE}"
     const val LIFECYCLE = "androidx.lifecycle:lifecycle-common-java8:${Versions.LIFECYCLE}"
     @Suppress("MaxLineLength")
     const val VIEW_BINDING_DELEGATE = "com.github.kirich1409:viewbindingpropertydelegate-noreflection:${Versions.VIEW_BINDING_DELEGATE}"
diff --git a/library/src/test/java/com/vinted/coper/CoperImplTest.kt b/library/src/test/java/com/vinted/coper/CoperImplTest.kt
index 07678b1..ad4dd18 100644
--- a/library/src/test/java/com/vinted/coper/CoperImplTest.kt
+++ b/library/src/test/java/com/vinted/coper/CoperImplTest.kt
@@ -16,6 +16,7 @@ import org.junit.Before
 import org.junit.Test
 import org.junit.runner.RunWith
 import org.mockito.Mockito.*
+import org.mockito.internal.util.MockUtil
 import org.mockito.kotlin.anyArray
 import org.mockito.kotlin.anyOrNull
 import org.mockito.kotlin.whenever
@@ -846,6 +847,8 @@ class CoperImplTest {
 
     private suspend fun CoperImpl.mockGetFragmentWithStub() {
         val coperFragment = getFragmentSafely()
+        if (MockUtil.isMock(coperFragment)) return
+
         val spyCoperFragment = spy(coperFragment)
         // This is needed because spy creates new instance and stubbing needs exact reference
         coperFragment.requireActivity().supportFragmentManager.beginTransaction()