diff --git a/src/test/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/exception/NotValidPaymentMethodEsceptionTest.java b/src/test/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/exception/NotValidPaymentMethodEsceptionTest.java
new file mode 100644
index 0000000..7ae5af4
--- /dev/null
+++ b/src/test/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/exception/NotValidPaymentMethodEsceptionTest.java
@@ -0,0 +1,58 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.subscription.exception;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+public class NotValidPaymentMethodEsceptionTest {
+
+    @Test
+    @DisplayName("Exception should be created with the provided message")
+    void testExceptionCreation() {
+        String errorMessage = "PaymentMethod data is not valid";
+
+        NotValidPaymentMethodException exception = new NotValidPaymentMethodException(errorMessage);
+
+        assertEquals(errorMessage, exception.getMessage());
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = {
+            "paymentType is not valid"
+    })
+    @DisplayName("Exception should handle different validation messages")
+    void testExceptionWithDifferentMessages(String errorMessage) {
+        NotValidPaymentMethodException exception = new NotValidPaymentMethodException(errorMessage);
+
+        assertEquals(errorMessage, exception.getMessage());
+    }
+
+    @Test
+    @DisplayName("Exception should be properly thrown and caught")
+    void testExceptionCanBeThrownAndCaught() {
+        String errorMessage = "paymentType is not valid";
+
+        Exception exception = assertThrows(NotValidPaymentMethodException.class, () -> {
+            throw new NotValidPaymentMethodException(errorMessage);
+        });
+
+        assertEquals(errorMessage, exception.getMessage());
+    }
+
+    @Test
+    @DisplayName("Exception should be catchable as a general Exception")
+    void testExceptionInheritance() {
+        String errorMessage = "Invalid paymentMethod data";
+
+        try {
+            throw new NotValidPaymentMethodException(errorMessage);
+        } catch (Exception e) {
+            assertEquals(NotValidPaymentMethodException.class, e.getClass());
+            assertEquals(errorMessage, e.getMessage());
+        }
+    }
+}
diff --git a/src/test/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/exception/NotValidSubscriptionExceptionTest.java b/src/test/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/exception/NotValidSubscriptionExceptionTest.java
new file mode 100644
index 0000000..a04d067
--- /dev/null
+++ b/src/test/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/exception/NotValidSubscriptionExceptionTest.java
@@ -0,0 +1,60 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.subscription.exception;
+
+import fr.iut_fbleau.but3.dev62.mylibrary.customer.exception.NotValidCustomerException;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+public class NotValidSubscriptionExceptionTest {
+
+    @Test
+    @DisplayName("Exception should be created with the provided message")
+    void testExceptionCreation() {
+        String errorMessage = "Subscription data is not valid";
+
+        NotValidSubscriptionException exception = new NotValidSubscriptionException(errorMessage);
+
+        assertEquals(errorMessage, exception.getMessage());
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = {
+            "subscriptionDurationDesired will be 3, 6 or 12 by the ENUM file SubscriptionDurationDesired",
+            "desiredStartDate cannot be before today"
+    })
+    @DisplayName("Exception should handle different validation messages")
+    void testExceptionWithDifferentMessages(String errorMessage) {
+        NotValidSubscriptionException exception = new NotValidSubscriptionException(errorMessage);
+
+        assertEquals(errorMessage, exception.getMessage());
+    }
+
+    @Test
+    @DisplayName("Exception should be properly thrown and caught")
+    void testExceptionCanBeThrownAndCaught() {
+        String errorMessage = "desiredStartDate cannot be before today";
+
+        Exception exception = assertThrows(NotValidSubscriptionException.class, () -> {
+            throw new NotValidSubscriptionException(errorMessage);
+        });
+
+        assertEquals(errorMessage, exception.getMessage());
+    }
+
+    @Test
+    @DisplayName("Exception should be catchable as a general Exception")
+    void testExceptionInheritance() {
+        String errorMessage = "Invalid subscription data";
+
+        try {
+            throw new NotValidSubscriptionException(errorMessage);
+        } catch (Exception e) {
+            assertEquals(NotValidSubscriptionException.class, e.getClass());
+            assertEquals(errorMessage, e.getMessage());
+        }
+    }
+}