diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 0923da98..2ce8195d 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         python-version: [ 3.7, 3.8, 3.9 ]
-        solver: ["classic", "libmamba"]
+        solver: ["classic"]
         os: [ubuntu-latest, macos-latest]
     steps:
     - name: Install system development tools