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 6a9a5b8daa768eec714a09f22e655bafc97e0f91..9a03d3d922d49bfefa6b78819a17374f5fe06978 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
@@ -35,8 +35,8 @@ class CertificateControllerTests {
 
     private final UserDto USER = new UserDto("novakovat",
             "novakova@gamil.com", "Tereza", "Nováková", new AddressDto());
-    private final CourseDto COURSE = new CourseDto(1L, "AJ1", 10,
-            LanguageTypeDto.ENGLISH, ProficiencyLevelDto.A1);
+    private final CourseDto COURSE = new CourseDto("A1", 10, LanguageTypeDto.ENGLISH,
+            ProficiencyLevelDto.A1);
     private final CertificateCreateDto certificateCreateDto = new CertificateCreateDto(USER, COURSE);
     private final CertificateSimpleDto certificateDto = new CertificateSimpleDto(0L, USER.getId(),
             Instant.now(), COURSE.getId(), "", "");
diff --git a/application/module-certificate/src/test/java/org/fuseri/modulecertificate/CertificateFacadeTests.java b/application/module-certificate/src/test/java/org/fuseri/modulecertificate/CertificateFacadeTests.java
index 0d1a7fa03ee7cbdb924f61f2f488675822b9a842..c48abac774409d71b0ee66a04ff02d23a6d1de17 100644
--- a/application/module-certificate/src/test/java/org/fuseri/modulecertificate/CertificateFacadeTests.java
+++ b/application/module-certificate/src/test/java/org/fuseri/modulecertificate/CertificateFacadeTests.java
@@ -21,7 +21,6 @@ import org.springframework.data.domain.PageRequest;
 import org.springframework.data.domain.Pageable;
 
 import java.time.Instant;
-import java.util.ArrayList;
 import java.util.List;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
@@ -34,8 +33,8 @@ import static org.mockito.Mockito.when;
 final class CertificateFacadeTests {
     private final UserDto USER = new UserDto("novakovat",
             "novakova@gamil.com", "Tereza", "Nováková", new AddressDto());
-    private final CourseDto COURSE = new CourseDto(1L,"AJ1", 10,
-            LanguageTypeDto.ENGLISH, ProficiencyLevelDto.A1);
+    private final CourseDto COURSE = new CourseDto("A1", 10, LanguageTypeDto.ENGLISH,
+            ProficiencyLevelDto.A1);
     private final CertificateCreateDto certificateCreateDto = new CertificateCreateDto(USER, COURSE);
     private final CertificateSimpleDto certificateDto = new CertificateSimpleDto(0L, USER.getId(),
             Instant.now(), COURSE.getId(), "", "");
diff --git a/application/module-certificate/src/test/java/org/fuseri/modulecertificate/CertificateMapperTests.java b/application/module-certificate/src/test/java/org/fuseri/modulecertificate/CertificateMapperTests.java
index 4392fda7b8485487d0fe660f10be340b80cb3498..145147ab3fe162c10ed3cc010cf0d21ed81c60af 100644
--- a/application/module-certificate/src/test/java/org/fuseri/modulecertificate/CertificateMapperTests.java
+++ b/application/module-certificate/src/test/java/org/fuseri/modulecertificate/CertificateMapperTests.java
@@ -4,7 +4,6 @@ import org.fuseri.model.dto.certificate.CertificateCreateDto;
 import org.fuseri.model.dto.certificate.CertificateSimpleDto;
 import org.fuseri.model.dto.course.CourseDto;
 import org.fuseri.model.dto.course.LanguageTypeDto;
-import org.fuseri.model.dto.course.ProficiencyLevelDto;
 import org.fuseri.model.dto.user.AddressDto;
 import org.fuseri.model.dto.user.UserDto;
 import org.fuseri.modulecertificate.service.CertificateMapper;
@@ -25,8 +24,8 @@ final class CertificateMapperTests {
 
     private final UserDto USER = new UserDto("novakovat",
             "novakova@gamil.com", "Tereza", "Nováková", new AddressDto());
-    private final CourseDto COURSE = new CourseDto(1L,"AJ1", 10,
-            LanguageTypeDto.ENGLISH, ProficiencyLevelDto.A1);
+    private final CourseDto COURSE = new CourseDto("name",10, LanguageTypeDto.ENGLISH,
+            org.fuseri.model.dto.course.ProficiencyLevelDto.B2);
     private final Instant instant = Instant.now();
     private final String fileName = "fileName";
     private final String file = "file";
diff --git a/application/module-certificate/src/test/java/org/fuseri/modulecertificate/CertificateServiceTests.java b/application/module-certificate/src/test/java/org/fuseri/modulecertificate/CertificateServiceTests.java
index 372e649060e89bd3c164f64d1c4b3039656598ff..18584bd94c327c215dd1733a5d1adb488c3402a0 100644
--- a/application/module-certificate/src/test/java/org/fuseri/modulecertificate/CertificateServiceTests.java
+++ b/application/module-certificate/src/test/java/org/fuseri/modulecertificate/CertificateServiceTests.java
@@ -36,8 +36,8 @@ final class CertificateServiceTests {
 
     private final UserDto USER = new UserDto("novakovat",
             "novakova@gamil.com", "Tereza", "Nováková", new AddressDto());
-    private final CourseDto COURSE = new CourseDto(1L, "AJ1", 10,
-            LanguageTypeDto.ENGLISH, ProficiencyLevelDto.A1);
+    private final CourseDto COURSE = new CourseDto("A1", 10, LanguageTypeDto.ENGLISH,
+            ProficiencyLevelDto.A1);
     private final Certificate certificate = new Certificate(USER.getId(),
             Instant.now(), COURSE.getId(), "file", "fileName");
     private final List<Certificate> certificates = List.of(certificate, certificate);