diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ca7d2ef40..c419af145 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -16,7 +16,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  MICROMAMBA_VERSION: 'latest'
+  MICROMAMBA_VERSION: '2.0.4alpha1-0'
 
 jobs:
   test: