diff --git a/.azure-pipelines/jobs/run-tests.yml b/.azure-pipelines/jobs/run-tests.yml
index 74235a49..2602cba6 100644
--- a/.azure-pipelines/jobs/run-tests.yml
+++ b/.azure-pipelines/jobs/run-tests.yml
@@ -18,7 +18,7 @@ steps:
     echo "Installing Pipenv…"
     pip install -e "$(pwd)[test]" --upgrade
     pipenv install --deploy --dev
-    pip install -e "$(pwd)[test]" --upgrade
+    pipenv run pip install -e "$(pwd)[test]" --upgrade
     echo pipenv --venv && echo pipenv --py && echo pipenv run python --version
   displayName: Make Virtualenv
 
diff --git a/tests/integration/test_pipenv.py b/tests/integration/test_pipenv.py
index deacc495..3f114288 100644
--- a/tests/integration/test_pipenv.py
+++ b/tests/integration/test_pipenv.py
@@ -100,10 +100,15 @@ def test_directory_with_leading_dash(PipenvInstance):
         return mkdtemp(suffix, prefix, dir)
 
     with mock.patch('pipenv.vendor.vistir.compat.mkdtemp', side_effect=mocked_mkdtemp):
+        del os.environ['PIPENV_VENV_IN_PROJECT']
         with temp_environ(), PipenvInstance(chdir=True) as p:
-            del os.environ['PIPENV_VENV_IN_PROJECT']
-            p.pipenv('--python python')
-            venv_path = p.pipenv('--venv').out.strip()
+            if "PIPENV_VENV_IN_PROJECT" in os.environ:
+                del os.environ['PIPENV_VENV_IN_PROJECT']
+            c = p.pipenv('--python python')
+            assert c.return_code == 0
+            c = p.pipenv('--venv')
+            assert c.return_code == 0
+            venv_path = c.out.strip()
             assert os.path.isdir(venv_path)
             # Manually clean up environment, since PipenvInstance assumes that
             # the virutalenv is in the project directory.
diff --git a/tests/integration/test_project.py b/tests/integration/test_project.py
index 237fd483..487524c6 100644
--- a/tests/integration/test_project.py
+++ b/tests/integration/test_project.py
@@ -183,7 +183,7 @@ def test_run_in_virtualenv_with_global_context(PipenvInstance, pypi, virtualenv)
         assert c.return_code == 0
         c = p.pipenv('run python -c "import click;print(click.__file__)"')
         assert c.return_code == 0
-        assert c.out.strip().startswith(str(virtualenv))
+        assert c.out.strip().startswith(virtualenv.as_posix())
         c = p.pipenv("clean --dry-run")
         assert c.return_code == 0
         assert "click" in c.out