diff --git a/backend/tests/PostService/PostService.Domain.Tests/CommentTests.cs b/backend/tests/PostService/PostService.Domain.Tests/CommentTests.cs
index e842202..dea52d2 100644
--- a/backend/tests/PostService/PostService.Domain.Tests/CommentTests.cs
+++ b/backend/tests/PostService/PostService.Domain.Tests/CommentTests.cs
@@ -14,7 +14,6 @@ public void Constructor_ShouldInitializeFieldsCorrectly()
         var userId = Guid.NewGuid().ToString();
         var username = "example";
         var content = "Content";
-        var createdAt = DateTime.UtcNow;
 
         // Act
         var comment = new Comment(postId, userId, username, content);
@@ -24,7 +23,6 @@ public void Constructor_ShouldInitializeFieldsCorrectly()
         comment.UserId.Should().Be(userId);
         comment.Username.Should().Be(username);
         comment.Content.Should().Be(content);
-        comment.CreatedAt.Date.Should().Be(createdAt.Date);
     }
 
     [Fact]
diff --git a/backend/tests/PostService/PostService.Domain.Tests/LikeTests.cs b/backend/tests/PostService/PostService.Domain.Tests/LikeTests.cs
index abc8771..873cfc7 100644
--- a/backend/tests/PostService/PostService.Domain.Tests/LikeTests.cs
+++ b/backend/tests/PostService/PostService.Domain.Tests/LikeTests.cs
@@ -12,7 +12,6 @@ public void Constructor_ShouldInitializeFieldsCorrectly()
         // Arrange
         var postId = Guid.NewGuid();
         var userId = Guid.NewGuid().ToString();
-        var createdAt = DateTime.UtcNow;
         
         // Act
         var like = new Like(postId, userId);
@@ -20,7 +19,6 @@ public void Constructor_ShouldInitializeFieldsCorrectly()
         // Assert
         like.PostId.Should().Be(postId);
         like.UserId.Should().Be(userId);
-        like.CreatedAt.Date.Should().Be(createdAt.Date);
     }
 
     [Fact]
diff --git a/backend/tests/PostService/PostService.Domain.Tests/PostTests.cs b/backend/tests/PostService/PostService.Domain.Tests/PostTests.cs
index 93a3adf..1fe2514 100644
--- a/backend/tests/PostService/PostService.Domain.Tests/PostTests.cs
+++ b/backend/tests/PostService/PostService.Domain.Tests/PostTests.cs
@@ -26,7 +26,6 @@ public void CreateTextPost_ShouldInitializeFieldsCorrectly()
         post.ContentType.Should().Be(ContentType.Text);
         post.LikeCount.Should().Be(0);
         post.CommentCount.Should().Be(0);
-        post.CreatedAt.Date.Should().Be(DateTime.UtcNow.Date);
     }
 
     [Fact]
@@ -49,7 +48,6 @@ public void CreateImagePost_ShouldInitializeFieldsCorrectly()
         post.ContentType.Should().Be(ContentType.Image);
         post.LikeCount.Should().Be(0);
         post.CommentCount.Should().Be(0);
-        post.CreatedAt.Date.Should().Be(DateTime.UtcNow.Date);
     }
 
     [Fact]
@@ -72,7 +70,6 @@ public void CreateVideoPost_ShouldInitializeFieldsCorrectly()
         post.ContentType.Should().Be(ContentType.Video);
         post.LikeCount.Should().Be(0);
         post.CommentCount.Should().Be(0);
-        post.CreatedAt.Date.Should().Be(DateTime.UtcNow.Date);
     }
 
     [Fact]