diff --git a/.github/workflows/develop.yml b/.github/workflows/develop.yml
index d61bd006..1d12b37a 100644
--- a/.github/workflows/develop.yml
+++ b/.github/workflows/develop.yml
@@ -151,6 +151,12 @@ jobs:
       - name: Build editor-ext
         run: pnpm --filter @docmost/editor-ext build
 
+      # @docmost/prosemirror-markdown is an ESM workspace package the server
+      # imports at runtime; its build/ is gitignored and test:e2e has no pretest
+      # hook, so build it before the e2e run (mirrors the test.yml job).
+      - name: Build prosemirror-markdown
+        run: pnpm --filter @docmost/prosemirror-markdown build
+
       - name: Run migrations
         run: pnpm --filter ./apps/server migration:latest
 
diff --git a/apps/server/test/jest-e2e.json b/apps/server/test/jest-e2e.json
index c7a61c13..2d696eb7 100644
--- a/apps/server/test/jest-e2e.json
+++ b/apps/server/test/jest-e2e.json
@@ -4,10 +4,14 @@
   "testEnvironment": "node",
   "testRegex": ".e2e-spec.ts$",
   "transform": {
+    "prosemirror-markdown/build/.+\\.js$": [
+      "babel-jest",
+      { "presets": [["@babel/preset-env", { "targets": { "node": "current" } }]] }
+    ],
     "^.+\\.(t|j)sx?$": ["ts-jest", { "tsconfig": { "allowJs": true } }]
   },
   "transformIgnorePatterns": [
-    "/node_modules/(?!(\\.pnpm/)?(nanoid|uuid|image-dimensions|marked|happy-dom|lib0|@sindresorhus[+/][a-z0-9-]+|escape-string-regexp|p-limit|yocto-queue)(@|/))"
+    "/node_modules/(?!(\\.pnpm/)?(nanoid|uuid|image-dimensions|marked|happy-dom|lib0|@sindresorhus[+/][a-z0-9-]+|escape-string-regexp|p-limit|yocto-queue|@docmost/prosemirror-markdown)(@|/))"
   ],
   "moduleNameMapper": {
     "^@docmost/db/(.*)$": "<rootDir>/../src/database/$1",
diff --git a/apps/server/test/jest-integration.json b/apps/server/test/jest-integration.json
index 1f42191e..30f62397 100644
--- a/apps/server/test/jest-integration.json
+++ b/apps/server/test/jest-integration.json
@@ -4,10 +4,14 @@
   "testRegex": ".*\\.int-spec\\.ts$",
   "testPathIgnorePatterns": ["/node_modules/"],
   "transform": {
+    "prosemirror-markdown/build/.+\\.js$": [
+      "babel-jest",
+      { "presets": [["@babel/preset-env", { "targets": { "node": "current" } }]] }
+    ],
     "^.+\\.(t|j)sx?$": "ts-jest"
   },
   "transformIgnorePatterns": [
-    "/node_modules/(?!(\\.pnpm/)?(nanoid|uuid|image-dimensions|marked|happy-dom|lib0)(@|/))"
+    "/node_modules/(?!(\\.pnpm/)?(nanoid|uuid|image-dimensions|marked|happy-dom|lib0|@docmost/prosemirror-markdown)(@|/))"
   ],
   "testEnvironment": "node",
   "testTimeout": 60000,