diff --git a/Java/build.gradle b/Java/build.gradle
index 616cec6a..58c8720f 100644
--- a/Java/build.gradle
+++ b/Java/build.gradle
@@ -10,6 +10,7 @@ dependencies {
     testImplementation 'org.junit.jupiter:junit-jupiter-api:5.6.2'
     testImplementation 'org.junit.jupiter:junit-jupiter-params:5.6.2'
     testImplementation 'org.junit.jupiter:junit-jupiter-engine:5.6.2'
+    testImplementation 'org.assertj:assertj-core:3.16.1'
 }
 
 group = 'com.gildedrose'