diff --git a/src/test/java/fr/iut_fbleau/but3/dev62/mylibrary/avis/entity/AvisTest.java b/src/test/java/fr/iut_fbleau/but3/dev62/mylibrary/avis/entity/AvisTest.java
new file mode 100644
index 0000000..832fc99
--- /dev/null
+++ b/src/test/java/fr/iut_fbleau/but3/dev62/mylibrary/avis/entity/AvisTest.java
@@ -0,0 +1,60 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.avis.entity;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import java.time.LocalDate;
+import java.util.UUID;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class AvisTest {
+
+  @Test
+  @DisplayName("Builder should create a valid Avis instance")
+  void testAvisBuilder() {
+    UUID id = UUID.randomUUID();
+    UUID clientId = UUID.randomUUID();
+    UUID livreId = UUID.randomUUID();
+
+    Avis avis = Avis.builder()
+        .id(id)
+        .clientId(clientId)
+        .livreId(livreId)
+        .note(5)
+        .commentaire("Excellent livre !")
+        .dateAchat(LocalDate.of(2024, 1, 15))
+        .build();
+
+    assertEquals(id, avis.getId());
+    assertEquals(clientId, avis.getClientId());
+    assertEquals(livreId, avis.getLivreId());
+    assertEquals(5, avis.getNote());
+    assertEquals("Excellent livre !", avis.getCommentaire());
+    assertEquals(LocalDate.of(2024, 1, 15), avis.getDateAchat());
+  }
+
+  @Test
+  @DisplayName("setRandomUUID should set a new non-null UUID")
+  void testSetRandomUUID() {
+    Avis avis = Avis.builder().build();
+    UUID originalId = avis.getId();
+
+    avis.setRandomUUID();
+
+    assertNotNull(avis.getId());
+    assertNotEquals(originalId, avis.getId());
+  }
+
+  @Test
+  @DisplayName("Two setRandomUUID calls should produce different UUIDs")
+  void testSetRandomUUIDTwice() {
+    Avis avis = Avis.builder().build();
+    avis.setRandomUUID();
+    UUID firstId = avis.getId();
+
+    avis.setRandomUUID();
+
+    assertNotEquals(firstId, avis.getId());
+  }
+}
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