diff --git a/tox.ini b/tox.ini
index 25ab10b4c..02923ca38 100644
--- a/tox.ini
+++ b/tox.ini
@@ -66,7 +66,7 @@ commands_pre =
     pip install git+https://github.com/Dao-AILab/fast-hadamard-transform.git
 
     # Install Mamba model dependencies (takes 8mins!)
-    # pip install --no-build-isolation git+https://github.com/state-spaces/mamba.git
+    pip install --no-build-isolation git+https://github.com/state-spaces/mamba.git
 
     # Install Eagle-3 test dependencies
     pip install tiktoken blobfile sentencepiece