diff --git a/frontend/src/app/dashboard/type/type-predicates.ts b/frontend/src/app/dashboard/type/type-predicates.ts
index 8c128b2c113..ae4217d79e9 100644
--- a/frontend/src/app/dashboard/type/type-predicates.ts
+++ b/frontend/src/app/dashboard/type/type-predicates.ts
@@ -22,24 +22,23 @@ import { DashboardProject } from "./dashboard-project.interface";
 import { DashboardFile } from "./dashboard-file.interface";
 import { DashboardDataset } from "./dashboard-dataset.interface";
 import { DashboardWorkflowComputingUnit } from "../../common/type/workflow-computing-unit";
-import { isNonNullObject } from "../../common/util/predicate";
 
 export function isDashboardWorkflow(value: any): value is DashboardWorkflow {
-  return !!value && isNonNullObject(value.workflow);
+  return value && typeof value.workflow === "object";
 }
 
 export function isDashboardProject(value: any): value is DashboardProject {
-  return !!value && typeof value.name === "string" && !value.workflow;
+  return value && typeof value.name === "string" && !value.workflow;
 }
 
 export function isDashboardFile(value: any): value is DashboardFile {
-  return !!value && typeof value.ownerEmail === "string" && isNonNullObject(value.file);
+  return value && typeof value.ownerEmail === "string" && typeof value.file === "object";
 }
 
 export function isDashboardDataset(value: any): value is DashboardDataset {
-  return !!value && isNonNullObject(value.dataset);
+  return value && typeof value.dataset === "object";
 }
 
 export function isDashboardWorkflowComputingUnit(value: any): value is DashboardWorkflowComputingUnit {
-  return !!value && isNonNullObject(value.computingUnit);
+  return value && typeof value.computingUnit === "object";
 }