diff --git a/.github/workflows/test-external.yml b/.github/workflows/test-external.yml
index b88197ef..cd5de33b 100644
--- a/.github/workflows/test-external.yml
+++ b/.github/workflows/test-external.yml
@@ -61,7 +61,9 @@ jobs:
           python-version: "3.11"
 
       - name: Install dependencies
-        run: python -m pip install --upgrade pip
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install -r ./halmos/requirements.txt
 
       - name: Install Halmos
         run: python -m pip install -e ./halmos
diff --git a/.github/workflows/test-ffi.yml b/.github/workflows/test-ffi.yml
index a53199a9..c48ca22f 100644
--- a/.github/workflows/test-ffi.yml
+++ b/.github/workflows/test-ffi.yml
@@ -33,6 +33,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install pytest
+          pip install -r requirements.txt
 
       - name: Install Halmos
         run: pip install -e .
diff --git a/.github/workflows/test-long.yml b/.github/workflows/test-long.yml
index 4833d91e..f311af52 100644
--- a/.github/workflows/test-long.yml
+++ b/.github/workflows/test-long.yml
@@ -37,6 +37,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install pytest
+          pip install -r requirements.txt
 
       - name: Install Halmos
         run: pip install -e .
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 4d515533..abb8429a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -35,6 +35,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install pytest
+          pip install -r requirements.txt
 
       - name: Install Halmos
         run: pip install -e .