fix the tests, maybe

Author: dimbleby

tests/utils/env/test_env_manager.py

@@ -69,7 +69,7 @@ def check_output(cmd: list[str], *args: Any, **kwargs: Any) -> str:
             return f"/usr/bin/{basename}"
 
         if "print(sys.base_prefix)" in python_cmd:
-            return "/usr"
+            return sys.base_prefix
 
         assert "import sys; print(sys.prefix)" in python_cmd
         return "/prefix"
@@ -967,7 +967,7 @@ def test_create_venv_tries_to_find_a_compatible_python_executable_using_specific
     mocker.patch(
         "subprocess.check_output",
         side_effect=[
-            "/usr",
+            sys.base_prefix,
             "/usr/bin/python3",
             "3.5.3",
             "/usr/bin/python3.9",
@@ -997,7 +997,7 @@ def test_create_venv_fails_if_no_compatible_python_version_could_be_found(
 
     poetry.package.python_versions = "^4.8"
 
-    mocker.patch("subprocess.check_output", side_effect=["/usr"])
+    mocker.patch("subprocess.check_output", side_effect=[sys.base_prefix])
     m = mocker.patch(
         "poetry.utils.env.EnvManager.build_venv", side_effect=lambda *args, **kwargs: ""
     )
@@ -1023,7 +1023,7 @@ def test_create_venv_does_not_try_to_find_compatible_versions_with_executable(
 
     poetry.package.python_versions = "^4.8"
 
-    mocker.patch("subprocess.check_output", side_effect=["/usr", "3.8.0"])
+    mocker.patch("subprocess.check_output", side_effect=[sys.base_prefix, "3.8.0"])
     m = mocker.patch(
         "poetry.utils.env.EnvManager.build_venv", side_effect=lambda *args, **kwargs: ""
     )