diff --git a/lib/spack/spack/test/__init__.py b/lib/spack/spack/test/__init__.py
index bea41a4adf2..3c5edde66b9 100644
--- a/lib/spack/spack/test/__init__.py
+++ b/lib/spack/spack/test/__init__.py
@@ -61,7 +61,6 @@
               'optional_deps',
               'make_executable',
               'configure_guess',
-              'unit_install',
               'lock',
               'database',
               'namespace_trie',