diff --git a/src/test/java/br/unicamp/cst/memorystorage/LogicalTimeTest.java b/src/test/java/br/unicamp/cst/memorystorage/LogicalTimeTest.java
new file mode 100644
index 0000000..0392783
--- /dev/null
+++ b/src/test/java/br/unicamp/cst/memorystorage/LogicalTimeTest.java
@@ -0,0 +1,24 @@
+package br.unicamp.cst.memorystorage;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import org.junit.jupiter.api.Test;
+
+public class LogicalTimeTest {
+
+    @Test
+    public void fromStringNotImplementedTest()
+    {
+        assertThrows(IllegalStateException.class, () -> LogicalTime.fromString("null"));
+    }
+
+    @Test
+    public void synchronizeNotImplementedTest()
+    {
+        LamportTime time = new LamportTime();
+
+        assertThrows(IllegalStateException.class, () -> LogicalTime.synchronize(time, time));
+    }
+   
+}