diff --git a/.github/workflows/positron-full-test.yml b/.github/workflows/positron-full-test.yml
index 49ecc497523..b37f191c473 100644
--- a/.github/workflows/positron-full-test.yml
+++ b/.github/workflows/positron-full-test.yml
@@ -115,7 +115,7 @@ jobs:
           curl https://raw.githubusercontent.com/posit-dev/qa-example-content/main/requirements.txt --output requirements.txt
           python -m pip install --upgrade pip
           python -m pip install -r requirements.txt
-          python -m pip install matplotlib ipykernel trcli graphviz
+          python -m pip install ipykernel trcli==1.9.5
 
       - name: Run Smoke Tests (Electron)
         env:
diff --git a/.github/workflows/positron-merge-to-main.yml b/.github/workflows/positron-merge-to-main.yml
index fab4ad687f6..05926add369 100644
--- a/.github/workflows/positron-merge-to-main.yml
+++ b/.github/workflows/positron-merge-to-main.yml
@@ -90,7 +90,7 @@ jobs:
           curl https://raw.githubusercontent.com/posit-dev/qa-example-content/main/requirements.txt --output requirements.txt
           python -m pip install --upgrade pip
           python -m pip install -r requirements.txt
-          python -m pip install matplotlib ipykernel graphviz trcli
+          python -m pip install ipykernel trcli==1.9.5
 
       - name: Run Unit Tests (node.js)
         id: nodejs-unit-tests