diff --git a/tox.ini b/tox.ini
index 35a12f916e1..6c4bb2e2bc8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -39,6 +39,8 @@ setenv =
     ; Tell the linker to look for shared libs inside the temporary Conda env.
     ; Needed to build BBHx's wheel, whick links to LAPACK.
     LIBRARY_PATH={envdir}/lib:{env:LIBRARY_PATH:}
+commands_pre =
+    conda list
 commands = pytest
 
 # The following are long running or may require