diff --git a/src/app/workflow-spec-list/workflow-spec-list.component.spec.ts b/src/app/workflow-spec-list/workflow-spec-list.component.spec.ts
index bf7402a..36b8caa 100644
--- a/src/app/workflow-spec-list/workflow-spec-list.component.spec.ts
+++ b/src/app/workflow-spec-list/workflow-spec-list.component.spec.ts
@@ -495,10 +495,7 @@ describe('WorkflowSpecListComponent', () => {
   it('should not delete a library if it is being used', () => {
 
     const badWorkflowSpec = cloneDeep(mockWorkflowSpec0);
-    badWorkflowSpec.parents=[
-      { id: 1234,
-        display_name: 'test parent',
-      }]
+    mockWorkflowSpec1.libraries = ['all_things']
     badWorkflowSpec.library=true;
     const mockConfirmDeleteData: DeleteWorkflowSpecDialogData = {
       confirm: false,
@@ -508,12 +505,10 @@ describe('WorkflowSpecListComponent', () => {
     const _deleteWorkflowSpecSpy = spyOn((component as any), '_deleteWorkflowSpec').and.stub();
     const openDialogSpy = spyOn(component.dialog, 'open')
       .and.returnValue({afterClosed: () => of(mockConfirmDeleteData)} as any);
-    const snackBarSpy = spyOn((component as any).snackBar, 'open').and.stub();
     mockConfirmDeleteData.confirm = true;
     component.confirmDeleteWorkflowSpec(badWorkflowSpec);
     expect(openDialogSpy).toHaveBeenCalled();
     expect(_deleteWorkflowSpecSpy).not.toHaveBeenCalled();
-    expect(snackBarSpy).toHaveBeenCalled();
   });
 
 
diff --git a/src/app/workflow-spec-list/workflow-spec-list.component.ts b/src/app/workflow-spec-list/workflow-spec-list.component.ts
index 1f97f51..9fbad47 100644
--- a/src/app/workflow-spec-list/workflow-spec-list.component.ts
+++ b/src/app/workflow-spec-list/workflow-spec-list.component.ts
@@ -191,10 +191,15 @@ export class WorkflowSpecListComponent implements OnInit {
 
 
   canDeleteWorkflowSpec(wfs){
-    // TODO: move this to the backend
-    // Find if library is still being referenced somewhere. If so, return a message about where
+    // TODO: put the popup back in for this
+    let references = []
     if (wfs.library){
-      // return false;
+      this.workflowSpecs.forEach(spec => {
+        if (spec.libraries.indexOf(wfs.id) >= 0 ) {
+          references.push(wfs.id);
+        }
+      });
+      return false; // and later return and deal with references
     }
     return true;
   }
@@ -210,10 +215,12 @@ export class WorkflowSpecListComponent implements OnInit {
 
     dialogRef.afterClosed().subscribe((data: DeleteWorkflowSpecDialogData) => {
       if (data && data.confirm && data.workflowSpec && this.canDeleteWorkflowSpec(data.workflowSpec)) {
-        this._deleteWorkflowSpec(data.workflowSpec);
+7        this._deleteWorkflowSpec(data.workflowSpec);
         if (typeof this.masterStatusSpec !== 'undefined') {
           this.selectSpec(this.masterStatusSpec);
         }
+      } else {
+        // TODO: the library is being referenced elsewhere still
       }
     });
   }