diff --git a/.github/workflows/python-tests.yml b/.github/workflows/python-tests.yml
index 8fee4e44..69923d04 100644
--- a/.github/workflows/python-tests.yml
+++ b/.github/workflows/python-tests.yml
@@ -6,6 +6,7 @@ on:
     paths:
       - '.github/workflows/python-tests.yml'
       - '**.py'
+      - 'pyproject.toml'
 jobs:
   lint:
     runs-on: ubuntu-latest
diff --git a/pyproject.toml b/pyproject.toml
index 1477ef4c..1f125735 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -52,7 +52,7 @@ test = [
 optional = [
     "streamlit",
     "boto3",
-    "botorch>=0.8.1",
+    "botorch>=0.8.1; python_version>='3.8'",
 ]
 
 preferential = [