diff --git a/extensions/git/package.json b/extensions/git/package.json
index b1ae36f57a7..9d6d4f43f3d 100644
--- a/extensions/git/package.json
+++ b/extensions/git/package.json
@@ -1833,6 +1833,7 @@
     "@types/which": "^1.0.28",
     "mocha": "^3.2.0",
     "mocha-junit-reporter": "^1.23.3",
-    "mocha-multi-reporters": "^1.1.7"
+    "mocha-multi-reporters": "^1.1.7",
+    "vscode-test": "^1.3.0"
   }
 }
diff --git a/extensions/git/yarn.lock b/extensions/git/yarn.lock
index ff2f8994487..0ae8237610c 100644
--- a/extensions/git/yarn.lock
+++ b/extensions/git/yarn.lock
@@ -41,6 +41,13 @@
   resolved "https://registry.yarnpkg.com/@types/which/-/which-1.0.28.tgz#016e387629b8817bed653fe32eab5d11279c8df6"
   integrity sha1-AW44dim4gXvtZT/jLqtdESecjfY=
 
+agent-base@4, agent-base@^4.3.0:
+  version "4.3.0"
+  resolved "https://registry.yarnpkg.com/agent-base/-/agent-base-4.3.0.tgz#8165f01c436009bccad0b1d122f05ed770efc6ee"
+  integrity sha512-salcGninV0nPrwpGNn4VTXBb1SOuXQBiqbrNXoeizJsHrsL6ERFM2Ne3JUSBWRE6aeNJI2ROP/WEEIDUiDe3cg==
+  dependencies:
+    es6-promisify "^5.0.0"
+
 ansi-regex@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-3.0.0.tgz#ed0317c322064f79466c02966bddb605ab37d998"
@@ -112,6 +119,13 @@ debug@2.6.8:
   dependencies:
     ms "2.0.0"
 
+debug@3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-3.1.0.tgz#5bb5a0672628b64149566ba16819e61518c67261"
+  integrity sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==
+  dependencies:
+    ms "2.0.0"
+
 debug@^2.2.0:
   version "2.6.9"
   resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.9.tgz#5d128515df134ff327e90a4c93f4e077a536341f"
@@ -143,6 +157,18 @@ diff@3.2.0:
   resolved "https://registry.yarnpkg.com/diff/-/diff-3.2.0.tgz#c9ce393a4b7cbd0b058a725c93df299027868ff9"
   integrity sha1-yc45Okt8vQsFinJck98pkCeGj/k=
 
+es6-promise@^4.0.3:
+  version "4.2.8"
+  resolved "https://registry.yarnpkg.com/es6-promise/-/es6-promise-4.2.8.tgz#4eb21594c972bc40553d276e510539143db53e0a"
+  integrity sha512-HJDGx5daxeIvxdBxvG2cb9g4tEvwIk3i8+nhX0yGrYmZUzbkdg8QbDevheDB8gd0//uPj4c1EQua8Q+MViT0/w==
+
+es6-promisify@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/es6-promisify/-/es6-promisify-5.0.0.tgz#5109d62f3e56ea967c4b63505aef08291c8a5203"
+  integrity sha1-UQnWLz5W6pZ8S2NQWu8IKRyKUgM=
+  dependencies:
+    es6-promise "^4.0.3"
+
 escape-string-regexp@1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz#1b61c0562190a8dff6ae3bb2cf0200ca130b86d4"
@@ -170,6 +196,18 @@ glob@7.1.1:
     once "^1.3.0"
     path-is-absolute "^1.0.0"
 
+glob@^7.1.3:
+  version "7.1.6"
+  resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.6.tgz#141f33b81a7c2492e125594307480c46679278a6"
+  integrity sha512-LwaxwyZ72Lk7vZINtNNrywX0ZuLyStrdDtabefZKAY5ZGJhVtgdznluResxNmPitE0SAO+O26sWTHeKSI2wMBA==
+  dependencies:
+    fs.realpath "^1.0.0"
+    inflight "^1.0.4"
+    inherits "2"
+    minimatch "^3.0.4"
+    once "^1.3.0"
+    path-is-absolute "^1.0.0"
+
 "graceful-readlink@>= 1.0.0":
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/graceful-readlink/-/graceful-readlink-1.0.1.tgz#4cafad76bc62f02fa039b2f94e9a3dd3a391a725"
@@ -190,6 +228,22 @@ he@1.1.1:
   resolved "https://registry.yarnpkg.com/he/-/he-1.1.1.tgz#93410fd21b009735151f8868c2f271f3427e23fd"
   integrity sha1-k0EP0hsAlzUVH4howvJx80J+I/0=
 
+http-proxy-agent@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/http-proxy-agent/-/http-proxy-agent-2.1.0.tgz#e4821beef5b2142a2026bd73926fe537631c5405"
+  integrity sha512-qwHbBLV7WviBl0rQsOzH6o5lwyOIvwp/BdFnvVxXORldu5TmjFfjzBcWUWS5kWAZhmv+JtiDhSuQCp4sBfbIgg==
+  dependencies:
+    agent-base "4"
+    debug "3.1.0"
+
+https-proxy-agent@^2.2.4:
+  version "2.2.4"
+  resolved "https://registry.yarnpkg.com/https-proxy-agent/-/https-proxy-agent-2.2.4.tgz#4ee7a737abd92678a293d9b34a1af4d0d08c787b"
+  integrity sha512-OmvfoQ53WLjtA9HeYP9RNrWMJzzAz1JGaSFr1nijg0PVR1JaD/xbJq1mdEIIlxGpXp9eSe/O2LgU9DJmTPd0Eg==
+  dependencies:
+    agent-base "^4.3.0"
+    debug "^3.1.0"
+
 iconv-lite@^0.4.24:
   version "0.4.24"
   resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.24.tgz#2022b4b25fbddc21d2f524974a474aafe733908b"
@@ -300,7 +354,7 @@ md5@^2.1.0:
     crypt "~0.0.1"
     is-buffer "~1.1.1"
 
-minimatch@^3.0.2:
+minimatch@^3.0.2, minimatch@^3.0.4:
   version "3.0.4"
   resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.4.tgz#5166e286457f03306064be5497e8dbb0c3d32083"
   integrity sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==
@@ -378,6 +432,13 @@ path-is-absolute@^1.0.0:
   resolved "https://registry.yarnpkg.com/path-is-absolute/-/path-is-absolute-1.0.1.tgz#174b9268735534ffbc7ace6bf53a5a9e1b5c5f5f"
   integrity sha1-F0uSaHNVNP+8es5r9TpanhtcX18=
 
+rimraf@^2.6.3:
+  version "2.7.1"
+  resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.7.1.tgz#35797f13a7fdadc566142c29d4f07ccad483e3ec"
+  integrity sha512-uWjbaKIK3T1OSVptzX7Nl6PvQ3qAGtKEtVRjRuazjfL3Bx5eI409VZSqgND+4UNnmzLVdPj9FqFJNPqBZFve4w==
+  dependencies:
+    glob "^7.1.3"
+
 "safer-buffer@>= 2.1.2 < 3":
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
@@ -414,6 +475,15 @@ vscode-nls@^4.0.0:
   resolved "https://registry.yarnpkg.com/vscode-nls/-/vscode-nls-4.0.0.tgz#4001c8a6caba5cedb23a9c5ce1090395c0e44002"
   integrity sha512-qCfdzcH+0LgQnBpZA53bA32kzp9rpq/f66Som577ObeuDlFIrtbEJ+A/+CCxjIh4G8dpJYNCKIsxpRAHIfsbNw==
 
+vscode-test@^1.3.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/vscode-test/-/vscode-test-1.3.0.tgz#3310ab385d9b887b4c82e8f52be1030e7cf9493d"
+  integrity sha512-LddukcBiSU2FVTDr3c1D8lwkiOvwlJdDL2hqVbn6gIz+rpTqUCkMZSKYm94Y1v0WXlHSDQBsXyY+tchWQgGVsw==
+  dependencies:
+    http-proxy-agent "^2.1.0"
+    https-proxy-agent "^2.2.4"
+    rimraf "^2.6.3"
+
 vscode-uri@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/vscode-uri/-/vscode-uri-2.0.0.tgz#2df704222f72b8a71ff266ba0830ed6c51ac1542"