diff --git a/pkgs/development/tools/mbed-cli/default.nix b/pkgs/development/tools/mbed-cli/default.nix
index 62489800cbb..cd80a5ad9e6 100644
--- a/pkgs/development/tools/mbed-cli/default.nix
+++ b/pkgs/development/tools/mbed-cli/default.nix
@@ -1,17 +1,28 @@
-{ lib, python3Packages }:
+{ lib, python3Packages, git, mercurial }:
 
 with python3Packages;
 
 buildPythonApplication rec {
   pname = "mbed-cli";
-  version = "1.8.3";
+  version = "1.9.1";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "04vn2v0d7y3vmm8cswzvn2z85balgp3095n5flvgf3r60fdlhlmp";
+    sha256 = "1228plh55id03qywsw0ai88ypdpbh9iz18jfcyhn21pci7mj77fv";
   };
 
-  doCheck = false; # no tests available in Pypi
+  checkInputs = [
+    git
+    mercurial
+    pytest
+  ];
+
+  checkPhase = ''
+    export GIT_COMMITTER_NAME=nixbld
+    export EMAIL=nixbld@localhost
+    export GIT_COMMITTER_DATE=$SOURCE_DATE_EPOCH
+    pytest test
+  '';
 
   meta = with lib; {
     homepage = https://github.com/ARMmbed/mbed-cli;