diff --git a/.tests/app/ubuntu/Dockerfile b/.tests/app/ubuntu/Dockerfile
index 9f802e2..73bd15e 100644
--- a/.tests/app/ubuntu/Dockerfile
+++ b/.tests/app/ubuntu/Dockerfile
@@ -4,12 +4,17 @@ ENV LANG=C.UTF-8
 WORKDIR /tmp
 RUN apt-get update \
     && apt-get install -y git curl net-tools \
-    && curl -sL https://deb.nodesource.com/setup_13.x | bash - \
+    && curl -sL https://deb.nodesource.com/setup_14.x | bash - \
     && curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - \
     && echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list \
     && apt-get update \
     && apt-get install -y python3 python3-pip python3-venv redis-server nodejs yarn \
-    && curl -sSL https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py | python3 \
+    #    && curl -sSL https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py | python3 \
+    #
+    # Pinning Poetry installer to this specific version. As of 2020 07 24, the script from master
+    # fails to install due to Python 2's executable matching first. See #2106
+    #
+    && curl -sSL https://raw.githubusercontent.com/python-poetry/poetry/e70ee3112ab06374dfef4ab84e6dded2382cc7dd/get-poetry.py | python3 \
     && python3 --version \
     && echo "NodeJS $(node --version)" \
     && echo "Yarn $(yarn --version)"