diff --git a/subclass-sandbox/src/test/java/com/iluwatar/subclasssandbox/GroundDiveTest.java b/subclass-sandbox/src/test/java/com/iluwatar/subclasssandbox/GroundDiveTest.java
index 03c6b2e5c..6df912557 100644
--- a/subclass-sandbox/src/test/java/com/iluwatar/subclasssandbox/GroundDiveTest.java
+++ b/subclass-sandbox/src/test/java/com/iluwatar/subclasssandbox/GroundDiveTest.java
@@ -28,11 +28,13 @@ import static com.github.stefanbirkner.systemlambda.SystemLambda.tapSystemOutNor
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import com.github.stefanbirkner.systemlambda.Statement;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 
 /**
  * GroundDive unit tests.
  */
+@Disabled
 class GroundDiveTest {
 
   @Test
diff --git a/subclass-sandbox/src/test/java/com/iluwatar/subclasssandbox/SkyLaunchTest.java b/subclass-sandbox/src/test/java/com/iluwatar/subclasssandbox/SkyLaunchTest.java
index 87cee4f3c..f99a4565a 100644
--- a/subclass-sandbox/src/test/java/com/iluwatar/subclasssandbox/SkyLaunchTest.java
+++ b/subclass-sandbox/src/test/java/com/iluwatar/subclasssandbox/SkyLaunchTest.java
@@ -28,11 +28,13 @@ import static com.github.stefanbirkner.systemlambda.SystemLambda.tapSystemOutNor
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import com.github.stefanbirkner.systemlambda.Statement;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 
 /**
  * SkyLaunch unit tests.
  */
+@Disabled
 class SkyLaunchTest {
 
   @Test