diff --git a/lib/components/JsonSchema/json-schema.html b/lib/components/JsonSchema/json-schema.html
index ff4000ac..c7865ff6 100644
--- a/lib/components/JsonSchema/json-schema.html
+++ b/lib/components/JsonSchema/json-schema.html
@@ -21,7 +21,7 @@
         title="{{schema._displayTypeHint}}">{{schema._displayType}} {{schema._displayFormat}}
         <span class="param-range" *ngIf="schema._range"> {{schema._range}} </span>
       </span>
-      <span *ngIf="prop['x-nullable']" class="param-nullable">Nullable</span>
+      <span *ngIf="schema['x-nullable']" class="param-nullable">Nullable</span>
       <div *ngIf="schema.enum" class="param-enum">
         <span *ngFor="let enumItem of schema.enum" class="enum-value {{enumItem.type}}"> {{enumItem.val | json}} </span>
       </div>
diff --git a/lib/shared/components/StickySidebar/sticky-sidebar.spec.ts b/lib/shared/components/StickySidebar/sticky-sidebar.spec.ts
index 14a86ecd..43bbaf2e 100644
--- a/lib/shared/components/StickySidebar/sticky-sidebar.spec.ts
+++ b/lib/shared/components/StickySidebar/sticky-sidebar.spec.ts
@@ -27,10 +27,23 @@ describe('Common components', () => {
       expect(component).not.toBeNull();
     });
 
-    it('should start sticked', () => {
+    it('should start unsticked', () => {
       spyOn(component, 'stick').and.callThrough();
+      spyOn(component, 'stickBottom').and.callThrough();
       fixture.detectChanges();
-      expect(component.stick).toHaveBeenCalled();
+      expect(component.stick).not.toHaveBeenCalled();
+      expect(component.stickBottom).not.toHaveBeenCalled();
+    });
+
+    it('should stick to the top on the next VM tick', (done) => {
+      spyOn(component, 'stick').and.callThrough();
+      spyOn(component, 'stickBottom').and.callThrough();
+      fixture.detectChanges();
+      setTimeout(() => {
+        expect(component.stick).toHaveBeenCalled();
+        expect(component.stickBottom).toHaveBeenCalled();
+        done();
+      });
     });
 
     it('should stick if scrolled more than scrollYOffset', () => {
@@ -42,6 +55,8 @@ describe('Common components', () => {
       component.updatePosition();
       expect(component.stick).toHaveBeenCalled();
     });
+
+    // TODO: add tests for stickBottom
   });
 });