diff --git a/androsample/build.gradle b/androsample/build.gradle
index ac86edb..e1b17c8 100644
--- a/androsample/build.gradle
+++ b/androsample/build.gradle
@@ -6,7 +6,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.0-rc2'
+        classpath 'com.android.tools.build:gradle:3.0.1'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         classpath "org.jetbrains.kotlin:kotlin-android-extensions:$kotlin_version"
     }
diff --git a/uspek/src/main/java/pl/mareklangiewicz/uspek/Utils.kt b/uspek/src/main/java/pl/mareklangiewicz/uspek/Utils.kt
index 8b188b4..868912a 100644
--- a/uspek/src/main/java/pl/mareklangiewicz/uspek/Utils.kt
+++ b/uspek/src/main/java/pl/mareklangiewicz/uspek/Utils.kt
@@ -3,6 +3,7 @@ package pl.mareklangiewicz.uspek
 import org.junit.Assert
 
 infix fun <T> T.eq(expected: T) = Assert.assertEquals(expected, this)
+infix fun <T> T.notEq(expected: T) = Assert.assertNotEquals(expected, this)
 
 val currentUserCodeLocation get() = Thread.currentThread().stackTrace.userCodeLocation