diff --git a/js/tests/unit/alert.spec.js b/js/tests/unit/alert.spec.js
index a1322f1c7b..916c7fd07c 100644
--- a/js/tests/unit/alert.spec.js
+++ b/js/tests/unit/alert.spec.js
@@ -19,6 +19,12 @@ describe('Alert', () => {
     expect(typeof Alert.VERSION).toEqual('string')
   })
 
+  describe('DATA_KEY', () => {
+    it('should return plugin data key', () => {
+      expect(Alert.DATA_KEY).toEqual('bs.alert')
+    })
+  })
+
   describe('data-api', () => {
     it('should close an alert without instantiating it manually', () => {
       fixtureEl.innerHTML = [
diff --git a/js/tests/unit/button.spec.js b/js/tests/unit/button.spec.js
index 51aa73774c..e442fd90d0 100644
--- a/js/tests/unit/button.spec.js
+++ b/js/tests/unit/button.spec.js
@@ -24,6 +24,12 @@ describe('Button', () => {
     })
   })
 
+  describe('DATA_KEY', () => {
+    it('should return plugin data key', () => {
+      expect(Button.DATA_KEY).toEqual('bs.button')
+    })
+  })
+
   describe('data-api', () => {
     it('should toggle active class on click', () => {
       fixtureEl.innerHTML = [
diff --git a/js/tests/unit/carousel.spec.js b/js/tests/unit/carousel.spec.js
index 2f47f2e00d..533e1ba7e2 100644
--- a/js/tests/unit/carousel.spec.js
+++ b/js/tests/unit/carousel.spec.js
@@ -45,6 +45,12 @@ describe('Carousel', () => {
     })
   })
 
+  describe('DATA_KEY', () => {
+    it('should return plugin data key', () => {
+      expect(Carousel.DATA_KEY).toEqual('bs.carousel')
+    })
+  })
+
   describe('constructor', () => {
     it('should go to next item if right arrow key is pressed', done => {
       fixtureEl.innerHTML = [
diff --git a/js/tests/unit/collapse.spec.js b/js/tests/unit/collapse.spec.js
index ff493cf51a..cd30ed8daa 100644
--- a/js/tests/unit/collapse.spec.js
+++ b/js/tests/unit/collapse.spec.js
@@ -27,6 +27,12 @@ describe('Collapse', () => {
     })
   })
 
+  describe('DATA_KEY', () => {
+    it('should return plugin data key', () => {
+      expect(Collapse.DATA_KEY).toEqual('bs.collapse')
+    })
+  })
+
   describe('constructor', () => {
     it('should allow jquery object in parent config', () => {
       fixtureEl.innerHTML = [
diff --git a/js/tests/unit/dropdown.spec.js b/js/tests/unit/dropdown.spec.js
index 04c35059e7..658cb65b04 100644
--- a/js/tests/unit/dropdown.spec.js
+++ b/js/tests/unit/dropdown.spec.js
@@ -33,6 +33,12 @@ describe('Dropdown', () => {
     })
   })
 
+  describe('DATA_KEY', () => {
+    it('should return plugin data key', () => {
+      expect(Dropdown.DATA_KEY).toEqual('bs.dropdown')
+    })
+  })
+
   describe('constructor', () => {
     it('should add a listener on trigger which do not have data-bs-toggle="dropdown"', () => {
       fixtureEl.innerHTML = [
diff --git a/js/tests/unit/modal.spec.js b/js/tests/unit/modal.spec.js
index 29c90bbf12..8a159eef6c 100644
--- a/js/tests/unit/modal.spec.js
+++ b/js/tests/unit/modal.spec.js
@@ -56,6 +56,12 @@ describe('Modal', () => {
     })
   })
 
+  describe('DATA_KEY', () => {
+    it('should return plugin data key', () => {
+      expect(Modal.DATA_KEY).toEqual('bs.modal')
+    })
+  })
+
   describe('toggle', () => {
     it('should toggle a modal', done => {
       fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog"></div></div>'
diff --git a/js/tests/unit/scrollspy.spec.js b/js/tests/unit/scrollspy.spec.js
index 917593f398..a00da485f8 100644
--- a/js/tests/unit/scrollspy.spec.js
+++ b/js/tests/unit/scrollspy.spec.js
@@ -47,6 +47,12 @@ describe('ScrollSpy', () => {
     })
   })
 
+  describe('DATA_KEY', () => {
+    it('should return plugin data key', () => {
+      expect(ScrollSpy.DATA_KEY).toEqual('bs.scrollspy')
+    })
+  })
+
   describe('constructor', () => {
     it('should generate an id when there is not one', () => {
       fixtureEl.innerHTML = [
diff --git a/js/tests/unit/toast.spec.js b/js/tests/unit/toast.spec.js
index 44f74aa36d..f8ef6e54b4 100644
--- a/js/tests/unit/toast.spec.js
+++ b/js/tests/unit/toast.spec.js
@@ -20,6 +20,12 @@ describe('Toast', () => {
     })
   })
 
+  describe('DATA_KEY', () => {
+    it('should return plugin data key', () => {
+      expect(Toast.DATA_KEY).toEqual('bs.toast')
+    })
+  })
+
   describe('constructor', () => {
     it('should allow to config in js', done => {
       fixtureEl.innerHTML = [