diff --git a/.circleci/config.yml b/.circleci/config.yml
index 221a85c773..f4c75b9b84 100755
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -304,7 +304,7 @@ jobs:
           name: Download test files and run
           command: |
             curl --proto '=https' --tlsv1.2 -sSf https://raw.githubusercontent.com/mozilla/application-services/main/install-nimbus-cli.sh | bash
-            pip install poetry
+            pip install poetry=1.8.5
             make integration_test_nimbus_fenix PYTEST_ARGS="$PYTEST_ARGS"
       - android/save-gradle-cache:
           cache-prefix: v1a
@@ -357,7 +357,7 @@ jobs:
       - run:
           name: Run Tests
           command: |
-            curl -sSL https://install.python-poetry.org | python3 - --version 1.8.4
+            curl -sSL https://install.python-poetry.org | python3 - --version 1.8.5
             echo 'export PATH=/Users/distiller/.local/bin:$PATH' >> "$BASH_ENV"
             source $BASH_ENV
             cd firefox-ios/firefox-ios/firefox-ios-tests/Tests/ExperimentIntegrationTests
diff --git a/experimenter/tests/integration/Dockerfile b/experimenter/tests/integration/Dockerfile
index 193af9a04d..96911e7ef2 100755
--- a/experimenter/tests/integration/Dockerfile
+++ b/experimenter/tests/integration/Dockerfile
@@ -10,6 +10,6 @@ RUN apt-get update -qqy && \
         python3-venv \
         python3-pip
 
-RUN pip install poetry
+RUN pip install poetry==1.8.5
 
 WORKDIR /code
diff --git a/experimenter/tests/nimbus_integration_tests.sh b/experimenter/tests/nimbus_integration_tests.sh
index 5192bda97b..62cb3e3fc4 100755
--- a/experimenter/tests/nimbus_integration_tests.sh
+++ b/experimenter/tests/nimbus_integration_tests.sh
@@ -37,7 +37,7 @@ if [[ -n "${FIREFOX_RELEASE}" ]]; then
     install_firefox "https://ftp.mozilla.org/pub/firefox/releases/${FIREFOX_DESKTOP_RELEASE_VERSION_ID}/linux-x86_64/en-US/firefox-${FIREFOX_DESKTOP_RELEASE_VERSION_ID}.tar.bz2"
 fi
 
-curl -sSL https://install.python-poetry.org | python3 - --version 1.8.4
+curl -sSL https://install.python-poetry.org | python3 - --version 1.8.5
 sudo chmod -R a+rwx /code/experimenter/tests/integration/
 mkdir -m a+rwx -p /code/experimenter/tests/integration/test-reports