diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
new file mode 100644
index 0000000000..32fd9730fb
--- /dev/null
+++ b/.github/workflows/ci.yaml
@@ -0,0 +1,33 @@
+name: CI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.7.1", "3.8", "3.9", "3.10", "3.11"]
+
+    # This job sets up Python versions using Python images instead of
+    # actions/setup-python because Python 3.7.1 does not exist in
+    # the GitHub local cache. Once the support for Python 3.7.1 is
+    # dropped, this job can be simplified to use actions/setup-python.
+    container:
+      image: python:${{ matrix.python-version }}
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install -e .[dev,datalib,wandb,embeddings]
+      - name: Test with pytest
+        run: python -m pytest
+        env:
+          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
diff --git a/.gitignore b/.gitignore
index 7ad641a0c8..5bffd45b87 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,7 @@
 /public/dist
 __pycache__
 build
+dist
 *.egg
 .vscode/settings.json
 .ipynb_checkpoints
diff --git a/openai/validators.py b/openai/validators.py
index 078179a44b..8237bce731 100644
--- a/openai/validators.py
+++ b/openai/validators.py
@@ -423,7 +423,7 @@ def completions_space_start_validator(df):
 
     def add_space_start(x):
         x["completion"] = x["completion"].apply(
-            lambda x: ("" if x[0] == " " else " ") + x
+            lambda x: ("" if x == "" or x[0] == " " else " ") + x
         )
         return x