diff --git a/tests/test_conda.py b/tests/test_conda.py
index 4f3f608..b1f8872 100644
--- a/tests/test_conda.py
+++ b/tests/test_conda.py
@@ -18,6 +18,9 @@ def prefix():
     with tempfile.TemporaryDirectory() as tmpdir:
         with conda.download_miniconda_installer(miniconda_version, miniconda_installer_md5) as installer_path:
             conda.install_miniconda(installer_path, tmpdir)
+        conda.ensure_conda_packages(tmpdir, [
+            'conda==4.5.8'
+        ])
         yield tmpdir