diff --git a/packages/commands/tests/src/index.spec.ts b/packages/commands/tests/src/index.spec.ts
index d19e07325..82b9a8c4a 100644
--- a/packages/commands/tests/src/index.spec.ts
+++ b/packages/commands/tests/src/index.spec.ts
@@ -701,9 +701,13 @@ describe('@lumino/commands', () => {
     describe('#processKeydownEvent()', () => {
       it('should dispatch on a correct keyboard event', () => {
         let called = false;
+        let _luminoEventType;
+        let _luminoEventKeys;
         registry.addCommand('test', {
-          execute: () => {
+          execute: (args) => {
             called = true;
+            _luminoEventType = (args._luminoEvent as ReadonlyJSONObject).type
+            _luminoEventKeys = (args._luminoEvent as ReadonlyJSONObject).keys
           }
         });
         registry.addKeyBinding({
@@ -718,6 +722,8 @@ describe('@lumino/commands', () => {
           })
         );
         expect(called).to.equal(true);
+        expect(_luminoEventType).to.equal('keybinding')
+        expect(_luminoEventKeys).to.contain('Ctrl ;')
       });
 
       it('should not dispatch on a suppressed node', () => {