diff --git a/pkgs/development/python-modules/linearmodels/default.nix b/pkgs/development/python-modules/linearmodels/default.nix
index 9a5ae03ffe5f..d67690e48774 100644
--- a/pkgs/development/python-modules/linearmodels/default.nix
+++ b/pkgs/development/python-modules/linearmodels/default.nix
@@ -67,6 +67,8 @@ buildPythonPackage (finalAttrs: {
 
   preCheck = ''
     rm linearmodels/__init__.py
+
+    export OMP_NUM_THREADS=1
   '';
 
   disabledTestPaths = [