diff --git a/src/main/java/assertions/Person.java b/src/main/java/assertions/Person.java
index ac7666b..7fd7de6 100644
--- a/src/main/java/assertions/Person.java
+++ b/src/main/java/assertions/Person.java
@@ -22,4 +22,9 @@ public String getFullName(){
     public Period getAge(){
         return Period.between(birthDate, LocalDate.now());
     }
+
+    public String getAgeToString() {
+        Period p = getAge();
+        return "Age: " + p.getYears() + " Years, " + p.getMonths() + " Months, " + p.getDays() + " Days.";
+    }
 }
diff --git a/src/test/java/assertions/PersonTest.java b/src/test/java/assertions/PersonTest.java
index eb0f3f7..540fd63 100644
--- a/src/test/java/assertions/PersonTest.java
+++ b/src/test/java/assertions/PersonTest.java
@@ -1,9 +1,10 @@
 package assertions;
 
+import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
-import sun.reflect.generics.reflectiveObjects.NotImplementedException;
 
 import java.time.LocalDate;
+import java.time.Period;
 
 class PersonTest {
 
@@ -11,29 +12,42 @@ class PersonTest {
 
     @Test
     void getFullNameReturnsFirstnameSpaceLastname(){
-        // TODO implement
-        throw new NotImplementedException();
+        Person p1 = new Person("Gion", "Baptista", LocalDate.of(1987, 1,1));
+        String fullName = p1.getFullName();
+
+        Assertions.assertEquals(fullName, "Gion Baptista");
     }
 
-    // TODO some more useful tests
+    @Test
+    void getAgeReturns10YearsIfBorn10y5m12dAgo() {
+        Person p = new Person("", "",LocalDate.now().minusYears(10).minusMonths(5).minusDays(12));
+
+        Period age = p.getAge();
+        System.out.println(age);
 
-    // getAge
+        Assertions.assertEquals(10, age.getYears());
+        Assertions.assertEquals(5, age.getMonths());
+        Assertions.assertEquals(12,age.getDays());
 
+    }
 
-    // TODO verbessern. Hinweis: Repeatable (wiederholbar) zu jeder Zeit.
     @Test
-    void getAgeReturns10YearsIfBornIn2009() throws Exception {
-        Person p = new Person("", "", LocalDate.of(2009, 1, 1));
+    void getAgeReturns1DayIfYesterday() {
+        Person p = new Person("", "", LocalDate.now().minusDays(1));
+
+        Period age = p.getAge();
 
-        throw new NotImplementedException();
+        Assertions.assertEquals(0, age.getYears());
+        Assertions.assertEquals(0, age.getMonths());
+        Assertions.assertEquals(1,age.getDays());
     }
 
     @Test
-    void getAgeReturns1DayIfYesterday() throws Exception {
-        Person p = new Person("", "", LocalDate.now().minusDays(1));
+    void getAgeToStringReturnsAgeAsString() {
+        Person p = new Person("", "",LocalDate.now().minusYears(10).minusMonths(5).minusDays(12));
+        System.out.println(p.getAgeToString());
 
-        // TODO implement
-        throw new NotImplementedException();
+        Assertions.assertEquals("Age: 10 Years, 5 Months, 12 Days.", p.getAgeToString());
     }
-    // TODO some more useful tests
+
 }
\ No newline at end of file
diff --git a/src/test/java/fakes/UserValidatorTest.java b/src/test/java/fakes/UserValidatorTest.java
index 0c2ceac..ecdf4fc 100644
--- a/src/test/java/fakes/UserValidatorTest.java
+++ b/src/test/java/fakes/UserValidatorTest.java
@@ -2,7 +2,7 @@
 
 import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
-import sun.reflect.generics.reflectiveObjects.NotImplementedException;
+
 
 class UserValidatorTest {
 
@@ -11,22 +11,22 @@ class isValidUsername{
 
         @Test
         void returnsTrueIfOnlyLetters(){
-            throw new NotImplementedException();
+
         }
 
         @Test
         void returnsFalseIfStartsWithNumber(){
-            throw new NotImplementedException();
+
         }
 
         @Test
         void returnsTrueIfContainsNumberButNotAsFirstChar(){
-            throw new NotImplementedException();
+
         }
 
         @Test
         void returnsFalseIfContainsAnyNonAlphanumericChar(){
-            throw new NotImplementedException();
+
         }
     }
 
@@ -34,12 +34,12 @@ static class doesUsernameExist{
 
         @Test
         void returnsTrueIfUsernameNotInDBYet(){
-            throw new NotImplementedException();
+
         }
 
         @Test
         void returnsFalseIfUsernameInDB(){
-            throw new NotImplementedException();
+
         }
     }
 }