diff --git a/azure-pipelines-ci.yml b/azure-pipelines-ci.yml
index eef4731c4ac..1e3d914aaf0 100644
--- a/azure-pipelines-ci.yml
+++ b/azure-pipelines-ci.yml
@@ -201,19 +201,16 @@ stages:
     container: $[ variables['PythonMain'] ]
     steps:
     - script: |
-        set -x
         python -m venv venv
 
         . venv/bin/activate
+        pip install -e .
         pip install -r requirements_test.txt -c homeassistant/package_constraints.txt
       displayName: 'Setup Env'
     - script: |
-        set -x
         TYPING_FILES=$(cat mypyrc)
         echo -e "Run mypy on: \n$TYPING_FILES"
 
         . venv/bin/activate
-        python --version
-        mypy --version
         mypy $TYPING_FILES
       displayName: 'Run mypy'
diff --git a/homeassistant/util/ruamel_yaml.py b/homeassistant/util/ruamel_yaml.py
index 04a98a84f03..931ad7adb91 100644
--- a/homeassistant/util/ruamel_yaml.py
+++ b/homeassistant/util/ruamel_yaml.py
@@ -88,7 +88,8 @@ def load_yaml(fname: str, round_trip: bool = False) -> JSON_TYPE:
     """Load a YAML file."""
     if round_trip:
         yaml = YAML(typ="rt")
-        yaml.preserve_quotes = True
+        # type ignore: https://bitbucket.org/ruamel/yaml/pull-requests/42
+        yaml.preserve_quotes = True  # type: ignore
     else:
         if ExtSafeConstructor.name is None:
             ExtSafeConstructor.name = fname