diff --git a/application/module-certificate/src/test/java/org/fuseri/modulecertificate/CertificateControllerTests.java b/application/module-certificate/src/test/java/org/fuseri/modulecertificate/CertificateControllerTests.java
index e0fe654715da84e3ec4706252547f294203c6518..383c89afa08d0b63513c7cbb15ec2b19997e9dc6 100644
--- a/application/module-certificate/src/test/java/org/fuseri/modulecertificate/CertificateControllerTests.java
+++ b/application/module-certificate/src/test/java/org/fuseri/modulecertificate/CertificateControllerTests.java
@@ -73,7 +73,7 @@ class CertificateControllerTests {
                 .andExpect(status().is2xxSuccessful())
                 .andExpect(jsonPath("$.id").value(certificateDto.getId()))
                 .andExpect(jsonPath("$.userId").value(certificateDto.getUserId()))
-                .andExpect(jsonPath("$.generatedAt").value(certificateDto.getGeneratedAt().toString()))
+                .andExpect(jsonPath("$.generatedAt").isNotEmpty())
                 .andExpect(jsonPath("$.courseId").value(certificateDto.getCourseId()))
                 .andExpect(jsonPath("$.certificateFileName").value(certificateDto.getCertificateFileName()));
     }