diff --git a/lib/core/src/lib/form/components/widgets/core/form-field.model.spec.ts b/lib/core/src/lib/form/components/widgets/core/form-field.model.spec.ts
index 5ae744233c..419615e1cc 100644
--- a/lib/core/src/lib/form/components/widgets/core/form-field.model.spec.ts
+++ b/lib/core/src/lib/form/components/widgets/core/form-field.model.spec.ts
@@ -306,7 +306,7 @@ describe('FormFieldModel', () => {
 
         const currentDateTime = new Date();
         const expectedDateTime = format(currentDateTime, 'yyyy-MM-dd hh:mm');
-        const expectedDateTimeFormat = `${format(currentDateTime, "yyyy-MM-dd'\T'hh:mm")}:00.000Z`;
+        const expectedDateTimeFormat = `${format(currentDateTime, "yyyy-MM-dd'T'hh:mm")}:00.000Z`;
 
         expect(field.value).toBe(expectedDateTime);
         expect(form.values['datetime']).toEqual(expectedDateTimeFormat);
diff --git a/lib/core/src/lib/form/components/widgets/date-time/date-time.widget.spec.ts b/lib/core/src/lib/form/components/widgets/date-time/date-time.widget.spec.ts
index d5099c3c40..7c5e5268bd 100644
--- a/lib/core/src/lib/form/components/widgets/date-time/date-time.widget.spec.ts
+++ b/lib/core/src/lib/form/components/widgets/date-time/date-time.widget.spec.ts
@@ -102,7 +102,7 @@ describe('DateTimeWidgetComponent', () => {
         });
 
         widget.field = field;
-        const mockDate = format(new Date('1982-03-13 10:00 AM'), "yyyy-MM-dd'\T'hh:mm:ssxxx");
+        const mockDate = format(new Date('1982-03-13 10:00 AM'), "yyyy-MM-dd'T'hh:mm:ssxxx");
         widget.onDateChanged(mockDate);
 
         expect(widget.onFieldChanged).toHaveBeenCalledWith(field);