diff --git a/package.json b/package.json
index b113afd9e..67b1dd8e3 100644
--- a/package.json
+++ b/package.json
@@ -69,8 +69,9 @@
     "@types/rollup-plugin-visualizer": "^4.2.1",
     "@typescript-eslint/eslint-plugin": "^5.48.2",
     "@typescript-eslint/parser": "^5.48.2",
-    "@vitest/coverage-c8": "^0.28.0",
-    "@vitest/ui": "^0.28.0",
+    "@vitest/coverage-c8": "^0.28.4",
+    "@vitest/spy": "^0.28.4",
+    "@vitest/ui": "^0.28.4",
     "concurrently": "^7.5.0",
     "coveralls": "^3.1.1",
     "cypress": "^10.11.0",
@@ -106,7 +107,7 @@
     "ts-node": "^10.9.1",
     "typescript": "^4.8.4",
     "vite": "^3.2.3",
-    "vitest": "^0.28.0"
+    "vitest": "^0.28.4"
   },
   "volta": {
     "node": "18.14.0"
diff --git a/packages/mermaid/src/tests/MockedD3.ts b/packages/mermaid/src/tests/MockedD3.ts
index 284b21b08..4600e2667 100644
--- a/packages/mermaid/src/tests/MockedD3.ts
+++ b/packages/mermaid/src/tests/MockedD3.ts
@@ -1,3 +1,5 @@
+import type {} from '@vitest/spy';
+
 /**
  * This is a mocked/stubbed version of the d3 Selection type. Each of the main functions are all
  * mocked (via vi.fn()) so you can track if they have been called, etc.
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 2ff618a17..dc1844d36 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -50,10 +50,13 @@ importers:
         specifier: ^5.48.2
         version: 5.48.2_yygwinqv3a2io74xmwofqb7uka
       '@vitest/coverage-c8':
-        specifier: ^0.28.0
+        specifier: ^0.28.4
         version: 0.28.4_ppxbkcip27yigfcjmn2ppf4tvu
+      '@vitest/spy':
+        specifier: ^0.28.4
+        version: 0.28.4
       '@vitest/ui':
-        specifier: ^0.28.0
+        specifier: ^0.28.4
         version: 0.28.4
       concurrently:
         specifier: ^7.5.0
@@ -161,7 +164,7 @@ importers:
         specifier: ^3.2.3
         version: 3.2.3_@types+node@18.11.9
       vitest:
-        specifier: ^0.28.0
+        specifier: ^0.28.4
         version: 0.28.4_ppxbkcip27yigfcjmn2ppf4tvu
 
   packages/mermaid:
@@ -4138,7 +4141,7 @@ packages:
   /axios/0.21.4_debug@4.3.2:
     resolution: {integrity: sha512-ut5vewkiu8jjGBdqpM44XxjuCjq9LAKeHVmoVfHVzy8eHgxxq8SbAVQNovDA8mVi05kP0Ea/n/UzcSHcTJQfNg==}
     dependencies:
-      follow-redirects: 1.15.2
+      follow-redirects: 1.15.2_debug@4.3.2
     transitivePeerDependencies:
       - debug
     dev: true
@@ -4466,7 +4469,7 @@ packages:
       check-error: 1.0.2
       deep-eql: 4.1.3
       get-func-name: 2.0.0
-      loupe: 2.3.4
+      loupe: 2.3.6
       pathval: 1.1.1
       type-detect: 4.0.8
     dev: true
@@ -6936,7 +6939,7 @@ packages:
     resolution: {integrity: sha512-XGozTsMPYkm+6b5QL3Z9wQcJjNYxp0CYn3U1gO7dwD6PAqU1SVWZxI9CCg3z+ml3YfqdPnrBehaBrnH2AGKbNA==}
     dev: true
 
-  /follow-redirects/1.15.2:
+  /follow-redirects/1.15.2_debug@4.3.2:
     resolution: {integrity: sha512-VQLG33o04KaQ8uYi2tVNbdrWp1QWxNNea+nmIB4EVM28v0hmP17z7aG1+wAkNzVq4KeXTq3221ye5qTJP91JwA==}
     engines: {node: '>=4.0'}
     peerDependencies:
@@ -6944,6 +6947,8 @@ packages:
     peerDependenciesMeta:
       debug:
         optional: true
+    dependencies:
+      debug: 4.3.2
     dev: true
 
   /foreground-child/2.0.0:
@@ -7483,7 +7488,7 @@ packages:
     engines: {node: '>=8.0.0'}
     dependencies:
       eventemitter3: 4.0.7
-      follow-redirects: 1.15.2
+      follow-redirects: 1.15.2_debug@4.3.2
       requires-port: 1.0.0
     transitivePeerDependencies:
       - debug
@@ -8799,12 +8804,6 @@ packages:
     resolution: {integrity: sha512-cHlYSUpL2s7Fb3394mYxwTYj8niTaNHUCLr0qdiCXQfSjfuA7CKofpX2uSwEfFDQ0EB7JcnMnm+GjbqqoinYYg==}
     dev: true
 
-  /loupe/2.3.4:
-    resolution: {integrity: sha512-OvKfgCC2Ndby6aSTREl5aCCPTNIzlDfQZvZxNUrBrihDhL3xcrYegTblhmEiCrg2kKQz4XsFIaemE5BF4ybSaQ==}
-    dependencies:
-      get-func-name: 2.0.0
-    dev: true
-
   /loupe/2.3.6:
     resolution: {integrity: sha512-RaPMZKiMy8/JruncMU5Bt6na1eftNoo++R4Y+N2FrxkDVTrGvcyzFTsaGif4QTeKESheMGegbhw6iUAq+5A8zA==}
     dependencies:
@@ -11822,7 +11821,7 @@ packages:
       picocolors: 1.0.0
       source-map: 0.6.1
       source-map-support: 0.5.21
-      vite: 3.2.3_@types+node@18.11.9
+      vite: 4.0.1_@types+node@18.11.9
     transitivePeerDependencies:
       - '@types/node'
       - less
@@ -11933,6 +11932,40 @@ packages:
       fsevents: 2.3.2
     dev: true
 
+  /vite/4.0.1_@types+node@18.11.9:
+    resolution: {integrity: sha512-kZQPzbDau35iWOhy3CpkrRC7It+HIHtulAzBhMqzGHKRf/4+vmh8rPDDdv98SWQrFWo6//3ozwsRmwQIPZsK9g==}
+    engines: {node: ^14.18.0 || >=16.0.0}
+    hasBin: true
+    peerDependencies:
+      '@types/node': '>= 14'
+      less: '*'
+      sass: '*'
+      stylus: '*'
+      sugarss: '*'
+      terser: ^5.4.0
+    peerDependenciesMeta:
+      '@types/node':
+        optional: true
+      less:
+        optional: true
+      sass:
+        optional: true
+      stylus:
+        optional: true
+      sugarss:
+        optional: true
+      terser:
+        optional: true
+    dependencies:
+      '@types/node': 18.11.9
+      esbuild: 0.16.7
+      postcss: 8.4.20
+      resolve: 1.22.1
+      rollup: 3.7.4
+    optionalDependencies:
+      fsevents: 2.3.2
+    dev: true
+
   /vitepress-plugin-search/1.0.4-alpha.16_ifjhkyx3os4sbm7zdnvthc52am:
     resolution: {integrity: sha512-D+rs7bwzH+IO+7T9NlxvqSOqmSKbN1yHxUoqClTy5JH+DomL3CcrH2TgSvXc2s58ztlc1dC07c7THo4cNjlUAg==}
     engines: {node: ^14.13.1 || ^16.7.0 || >=18}
@@ -12023,7 +12056,7 @@ packages:
       tinybench: 2.3.1
       tinypool: 0.3.1
       tinyspy: 1.0.2
-      vite: 3.2.3_@types+node@18.11.9
+      vite: 4.0.1_@types+node@18.11.9
       vite-node: 0.28.4_@types+node@18.11.9
       why-is-node-running: 2.2.2
     transitivePeerDependencies: