diff --git a/pkg/webservice/handlers_test.go b/pkg/webservice/handlers_test.go
index be4166ff1..136f6b1f8 100644
--- a/pkg/webservice/handlers_test.go
+++ b/pkg/webservice/handlers_test.go
@@ -1228,7 +1228,7 @@ func assertApplicationExists(t *testing.T, resp *MockResponseWriter) {
 	err := json.Unmarshal(resp.outputBytes, &errInfo)
 	assert.NilError(t, err, "failed to unmarshal applications dao response from response body")
 	assert.Equal(t, http.StatusBadRequest, resp.statusCode, "Incorrect Status code")
-	assert.Equal(t, errInfo.Message, "Application not found", "JSON error message is incorrect")
+	assert.Equal(t, errInfo.Message, ApplicationDoesNotExists, "JSON error message is incorrect")
 	assert.Equal(t, errInfo.StatusCode, http.StatusBadRequest)
 }
 
@@ -1237,7 +1237,7 @@ func assertUserExists(t *testing.T, resp *MockResponseWriter) {
 	err := json.Unmarshal(resp.outputBytes, &errInfo)
 	assert.NilError(t, err, "failed to unmarshal applications dao response from response body")
 	assert.Equal(t, http.StatusBadRequest, resp.statusCode, "Incorrect Status code")
-	assert.Equal(t, errInfo.Message, "User not found", "JSON error message is incorrect")
+	assert.Equal(t, errInfo.Message, UserDoesNotExists, "JSON error message is incorrect")
 	assert.Equal(t, errInfo.StatusCode, http.StatusBadRequest)
 }
 
@@ -1246,7 +1246,7 @@ func assertUserNameExists(t *testing.T, resp *MockResponseWriter) {
 	err := json.Unmarshal(resp.outputBytes, &errInfo)
 	assert.NilError(t, err, "failed to unmarshal applications dao response from response body")
 	assert.Equal(t, http.StatusBadRequest, resp.statusCode, "Incorrect Status code")
-	assert.Equal(t, errInfo.Message, "User name is missing", "JSON error message is incorrect")
+	assert.Equal(t, errInfo.Message, UserNameMissing, "JSON error message is incorrect")
 	assert.Equal(t, errInfo.StatusCode, http.StatusBadRequest)
 }
 
@@ -1255,7 +1255,7 @@ func assertGroupExists(t *testing.T, resp *MockResponseWriter) {
 	err := json.Unmarshal(resp.outputBytes, &errInfo)
 	assert.NilError(t, err, "failed to unmarshal applications dao response from response body")
 	assert.Equal(t, http.StatusBadRequest, resp.statusCode, "Incorrect Status code")
-	assert.Equal(t, errInfo.Message, "Group not found", "JSON error message is incorrect")
+	assert.Equal(t, errInfo.Message, GroupDoesNotExists, "JSON error message is incorrect")
 	assert.Equal(t, errInfo.StatusCode, http.StatusBadRequest)
 }
 
@@ -1264,7 +1264,7 @@ func assertGroupNameExists(t *testing.T, resp *MockResponseWriter) {
 	err := json.Unmarshal(resp.outputBytes, &errInfo)
 	assert.NilError(t, err, "failed to unmarshal applications dao response from response body")
 	assert.Equal(t, http.StatusBadRequest, resp.statusCode, "Incorrect Status code")
-	assert.Equal(t, errInfo.Message, "Group name is missing", "JSON error message is incorrect")
+	assert.Equal(t, errInfo.Message, GroupNameMissing, "JSON error message is incorrect")
 	assert.Equal(t, errInfo.StatusCode, http.StatusBadRequest)
 }
 
@@ -1273,7 +1273,7 @@ func assertNodeIDExists(t *testing.T, resp *MockResponseWriter) {
 	err := json.Unmarshal(resp.outputBytes, &errInfo)
 	assert.NilError(t, err, "failed to unmarshal node dao response from response body")
 	assert.Equal(t, http.StatusBadRequest, resp.statusCode, "Incorrect Status code")
-	assert.Equal(t, errInfo.Message, "Node not found", "JSON error message is incorrect")
+	assert.Equal(t, errInfo.Message, NodeDoesNotExists, "JSON error message is incorrect")
 	assert.Equal(t, errInfo.StatusCode, http.StatusBadRequest)
 }