diff --git a/tests.py b/tests.py
index 3ebc8d4f992044a39891428bcbcd0ee91aba36af..9276189dbe12272324696e7d55a31daa14a4dd56 100644
--- a/tests.py
+++ b/tests.py
@@ -164,13 +164,13 @@ def test_setup_log_cmd(tmp_path):
 
     Check that logs/install-software-environment.log is updated when the module is run
     """
-    log_file = "install.log"
+    cmd_log_file = mod.config_vars['cmd_log_file']
 
     script_dir = tmp_path / "test_prepare_env"
     mpsd_release_to_test = "dev-23a"
     release_base_dir = script_dir / mpsd_release_to_test
-    if os.path.exists(release_base_dir / log_file):
-        initial_bytes = os.path.getsize(log_file)
+    if os.path.exists(release_base_dir / cmd_log_file):
+        initial_bytes = os.path.getsize(cmd_log_file)
     else:
         initial_bytes = 0
 
@@ -179,11 +179,11 @@ def test_setup_log_cmd(tmp_path):
     mod.prepare_environment(mpsd_release=mpsd_release_to_test, script_dir=(script_dir))
 
     # check that logs/install-software-environment.log is updated
-    assert os.path.exists(release_base_dir / log_file)
-    assert os.path.getsize(release_base_dir / log_file) > initial_bytes
+    assert os.path.exists(release_base_dir / cmd_log_file)
+    assert os.path.getsize(release_base_dir / cmd_log_file) > initial_bytes
 
     # Check that the log file has "Spack environments branch: dev-23a " in the last line
-    with open(release_base_dir / log_file, "r") as f:
+    with open(release_base_dir / cmd_log_file, "r") as f:
         last_line = f.readlines()[-1]
         assert "Spack environments branch: dev-23a " in last_line
 
@@ -227,6 +227,7 @@ def test_install_environment_zlib():
     script_dir.mkdir(exist_ok=True, parents=True)
     mpsd_release_to_test = "dev-23a"
     toolchain_to_test = "global_generic"
+    cmd_log_file = mod.config_vars['cmd_log_file']
     mpsd_microarch = mod.get_native_microarchitecture()
     release_base_dir = script_dir / mpsd_release_to_test
     create_mock_git_repository(target_directory=script_dir, create_directory=False)
@@ -301,11 +302,11 @@ def test_install_environment_zlib():
     os.path.basename(build_log)
 
     # assert that install log files exists
-    assert os.path.exists(release_base_dir / "install.log")
+    assert os.path.exists(release_base_dir / cmd_log_file)
 
     # assert that the build log is written to the install log file
     os.path.basename(build_log)
-    with open(release_base_dir / "install.log", "r") as f:
+    with open(release_base_dir / cmd_log_file, "r") as f:
         lines = f.read()
         assert (
             f"installing {toolchain_to_test} and logging at {str(build_log)}" in lines