diff --git a/build.gradle b/build.gradle
index 0870c61985..08885dca27 100644
--- a/build.gradle
+++ b/build.gradle
@@ -163,6 +163,7 @@ configure(allprojects) { project ->
 		}
 		testCompile("io.mockk:mockk:1.9.1")
 		testCompile("org.hamcrest:hamcrest-all:1.3")
+		testCompile("org.assertj:assertj-core:3.11.0")
 		testRuntime("org.apache.logging.log4j:log4j-core:${log4jVersion}")
 		testRuntime("org.apache.logging.log4j:log4j-slf4j-impl:${log4jVersion}")
 		testRuntime("org.apache.logging.log4j:log4j-jul:${log4jVersion}")