diff --git a/packages/git/package.json b/packages/git/package.json
index 8d4224ec9deaf..121f9d5d5c1e0 100644
--- a/packages/git/package.json
+++ b/packages/git/package.json
@@ -11,9 +11,9 @@
     "@theia/scm": "1.50.0",
     "@theia/scm-extra": "1.50.0",
     "@theia/workspace": "1.50.0",
-    "@types/diff": "^3.2.2",
+    "@types/diff": "^5.2.1",
     "@types/p-queue": "^2.3.1",
-    "diff": "^3.4.0",
+    "diff": "^5.2.0",
     "dugite-extra": "0.1.17",
     "find-git-exec": "^0.0.4",
     "find-git-repositories": "^0.1.1",
diff --git a/packages/scm/package.json b/packages/scm/package.json
index 552b7669c3ee2..4a995ee612b18 100644
--- a/packages/scm/package.json
+++ b/packages/scm/package.json
@@ -8,8 +8,8 @@
     "@theia/filesystem": "1.50.0",
     "@theia/monaco": "1.50.0",
     "@theia/monaco-editor-core": "1.83.101",
-    "@types/diff": "^3.2.2",
-    "diff": "^3.4.0",
+    "@types/diff": "^5.2.1",
+    "diff": "^5.2.0",
     "p-debounce": "^2.1.0",
     "react-autosize-textarea": "^7.0.0",
     "ts-md5": "^1.2.2",
@@ -45,6 +45,7 @@
     "compile": "theiaext compile",
     "docs": "theiaext docs",
     "lint": "theiaext lint",
+    "test": "theiaext test",
     "watch": "theiaext watch"
   },
   "devDependencies": {
diff --git a/yarn.lock b/yarn.lock
index 7e743ace87f5e..f90c3d48d0083 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1861,10 +1861,10 @@
   dependencies:
     "@types/node" "*"
 
-"@types/diff@^3.2.2":
-  version "3.5.8"
-  resolved "https://registry.yarnpkg.com/@types/diff/-/diff-3.5.8.tgz#24434e47c2ef1cbcdf96afa43c6ea2fd8e4add93"
-  integrity sha512-CZ5vepL87+M8PxRIvJjR181Erahch2w7Jev/XJm+Iot/SOvJh8QqH/N79b+vsKtYF6fFzoPieiiq2c5tzmXR9A==
+"@types/diff@^5.2.1":
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/@types/diff/-/diff-5.2.1.tgz#cceae9c4b2dae5c6b8ab1ce1263601c255d87fb3"
+  integrity sha512-uxpcuwWJGhe2AR1g8hD9F5OYGCqjqWnBUQFD8gMZsDbv8oPHzxJF6iMO6n8Tk0AdzlxoaaoQhOYlIg/PukVU8g==
 
 "@types/docker-modem@*":
   version "3.0.6"
@@ -4740,17 +4740,12 @@ diff@5.0.0:
   resolved "https://registry.yarnpkg.com/diff/-/diff-5.0.0.tgz#7ed6ad76d859d030787ec35855f5b1daf31d852b"
   integrity sha512-/VTCrvm5Z0JGty/BWHljh+BAiw3IK+2j87NGMu8Nwc/f48WoDAC395uomO9ZD117ZOBaHmkX1oyLvkVM/aIT3w==
 
-diff@^3.4.0:
-  version "3.5.0"
-  resolved "https://registry.yarnpkg.com/diff/-/diff-3.5.0.tgz#800c0dd1e0a8bfbc95835c202ad220fe317e5a12"
-  integrity sha512-A46qtFgd+g7pDZinpnwiRJtxbC1hpgf0uzP3iG89scHk0AUC7A1TGxf5OiiOUv/JMZR8GOt8hL900hV0bOy5xA==
-
 diff@^4.0.1:
   version "4.0.2"
   resolved "https://registry.yarnpkg.com/diff/-/diff-4.0.2.tgz#60f3aecb89d5fae520c11aa19efc2bb982aade7d"
   integrity sha512-58lmxKSA4BNyLz+HHMUzlOEpg09FV+ev6ZMe3vJihgdxzgcwZ8VoEEPmALCZG9LmqfVoNMMKpttIYTVG6uDY7A==
 
-diff@^5.0.0:
+diff@^5.0.0, diff@^5.2.0:
   version "5.2.0"
   resolved "https://registry.yarnpkg.com/diff/-/diff-5.2.0.tgz#26ded047cd1179b78b9537d5ef725503ce1ae531"
   integrity sha512-uIFDxqpRZGZ6ThOk84hEfqWoHx2devRFvpTZcTHur85vImfaxUbTW9Ryh4CpCuDnToOP1CEtXKIgytHBPVff5A==