diff --git a/tests.py b/tests.py
index 9276189dbe12272324696e7d55a31daa14a4dd56..fb2103ffc165991753afe27de19fe2db08939134 100644
--- a/tests.py
+++ b/tests.py
@@ -294,7 +294,7 @@ def test_install_environment_zlib():
     )
     assert len(build_log) == 2
     # take the most recent build log
-    build_log = sorted(build_log)[0]
+    build_log = sorted(build_log)[1]
     # check that the build log contains statement ##### Installation finished
     with open(build_log, "r") as f:
         lines = f.read()