diff --git a/pkgs/development/python-modules/rtfde/default.nix b/pkgs/development/python-modules/rtfde/default.nix
index d436f19a45eb..6c8be8f8f5b7 100644
--- a/pkgs/development/python-modules/rtfde/default.nix
+++ b/pkgs/development/python-modules/rtfde/default.nix
@@ -26,6 +26,8 @@ buildPythonPackage rec {
 
   build-system = [ setuptools ];
 
+  pythonRelaxDeps = [ "lark" ];
+
   dependencies = [
     lark
     oletools
@@ -39,15 +41,15 @@ buildPythonPackage rec {
   pythonImportsCheck = [ "RTFDE" ];
 
   disabledTests = [
-    # Content mismatch
-    "test_bin_data_captured"
+    # Malformed encapsulated RTF discovered
+    "test_encoded_bytes_stay_encoded_character"
   ];
 
-  meta = with lib; {
+  meta = {
+    changelog = "https://github.com/seamustuohy/RTFDE/releases/tag/${version}";
     description = "Library for extracting encapsulated HTML and plain text content from the RTF bodies";
     homepage = "https://github.com/seamustuohy/RTFDE";
-    changelog = "https://github.com/seamustuohy/RTFDE/releases/tag/${version}";
-    license = licenses.lgpl3Only;
-    maintainers = with maintainers; [ fab ];
+    license = lib.licenses.lgpl3Only;
+    maintainers = with lib.maintainers; [ fab ];
   };
 }