The deps in the new test are not compatible with older Python and pip

tests/test_micropipenv.py

@@ -43,6 +43,8 @@
 WIN = sys.platform == "win32"
 BIN_DIR = "Scripts" if WIN else "bin"
 SP_DIR = ("lib", "site-packages") if WIN else ("lib", "python*", "site-packages")
+PY_LE_37 = sys.version_info[:2] <= (3, 7)
+MANYLINUX_2014 = PIP_VERSION.major >= 19 and PIP_VERSION.minor >= 3
 
 
 @contextmanager
@@ -373,6 +375,8 @@ def test_install_poetry_type_url(venv):
 
 
 @pytest.mark.online
+@pytest.mark.skipif(PY_LE_37, reason="Deps not compatible with Python <= 3.7")
+@pytest.mark.skipif(not MANYLINUX_2014, reason="Deps provided as manylinux2014 wheels - needs pip 19.3+.")
 def test_install_poetry_complex_dep_tree_deploy(venv):
     """Test invoking installation using information from a Poetry project using url source format."""
     cmd = [