diff --git a/.github/workflows/build-and-test.yml b/.github/workflows/build-and-test.yml
index b8173330d5..e82c2b0881 100644
--- a/.github/workflows/build-and-test.yml
+++ b/.github/workflows/build-and-test.yml
@@ -53,7 +53,7 @@ jobs:
       - name: "Install test runner dependencies"
         run: |
           set -xe
-          python3 -m pip install --upgrade 'pip==23.1.0' setuptools wheel 'tox<4' tox-gh-actions coverage virtualenv 'snmpsim>=1.0'
+          python3 -m pip install --upgrade 'pip==23.1.0' setuptools wheel 'tox<4' tox-gh-actions coverage virtualenv
           sudo apt-get install -y nbtscan
 
       # virtualenv seems to currently be embedding a broken version of
diff --git a/tests/docker/Dockerfile b/tests/docker/Dockerfile
index e4a1086ab0..73dcdb5681 100644
--- a/tests/docker/Dockerfile
+++ b/tests/docker/Dockerfile
@@ -67,7 +67,7 @@ RUN cd /tmp && \
     mv chromedriver /usr/local/bin/
 
 # Install our primary test runner
-RUN python3.9 -m pip install 'tox<4' 'snmpsim>=1.0' virtualenv
+RUN python3.9 -m pip install 'tox<4' virtualenv
 
 # Add a build user
 ENV USER build
diff --git a/tests/requirements.txt b/tests/requirements.txt
index 98964ea0de..d7ad4f06a8 100644
--- a/tests/requirements.txt
+++ b/tests/requirements.txt
@@ -12,6 +12,8 @@ pytest-timeout
 pytest-twisted~=1.13.0
 pytidylib==0.3.2
 selenium==3.141.0
+snmpsim>=1.0
+pyasn1<0.6.0  # Really just a constraint because of incompatibility with snmpsim
 toml
 whisper>=0.9.9
 whitenoise==4.1.4