diff --git a/projects/github.com/mamba-org/micro/package.yml b/projects/github.com/mamba-org/micro/package.yml
index 95512d1645..b3d5020f20 100644
--- a/projects/github.com/mamba-org/micro/package.yml
+++ b/projects/github.com/mamba-org/micro/package.yml
@@ -32,5 +32,5 @@ test:
   - |
     eval "$(micromamba shell hook --shell bash)"
     micromamba create numpy --channel anaconda --prefix mm-prefix --yes
-    micromamba activate
+    micromamba activate mm-prefix
     ./test.py