diff --git a/src/test/kotlin/solve/TestUtils.kt b/src/test/kotlin/solve/TestUtils.kt
index bacf9004..0e9dc153 100644
--- a/src/test/kotlin/solve/TestUtils.kt
+++ b/src/test/kotlin/solve/TestUtils.kt
@@ -7,8 +7,6 @@ import javafx.scene.input.MouseButton
 import javafx.scene.input.MouseEvent
 import javafx.scene.input.ScrollEvent
 import javafx.scene.input.ScrollEvent.HorizontalTextScrollUnits
-import org.junit.jupiter.api.Assertions.assertNull
-import java.lang.ref.WeakReference
 
 internal fun<T> testMemoryLeak(factory: () -> T, action: (T) -> Unit) {
     /*val weakReference = WeakReference(factory())