diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 87f9a7a..6ff4011 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -49,6 +49,8 @@ jobs:
       - name: Run tests
         run: |
           poetry run pytest -v -s ./tests
+        env:
+          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
 
   lint_check:
     runs-on: ubuntu-latest
diff --git a/tests/embedders/test_openai.py b/tests/embedders/test_openai.py
new file mode 100644
index 0000000..f33eb4d
--- /dev/null
+++ b/tests/embedders/test_openai.py
@@ -0,0 +1,23 @@
+import numpy as np
+
+from jmteb.embedders.openai_embedder import OpenAIEmbedder
+
+OUTPUT_DIM = 1536
+
+
+class TestSentenceBertEmbedder:
+    def setup_class(cls):
+        cls.model = OpenAIEmbedder(model="text-embedding-3-small")
+
+    def test_encode(self):
+        embeddings = self.model.encode("任意のテキスト")
+        assert isinstance(embeddings, np.ndarray)
+        assert embeddings.shape == (OUTPUT_DIM,)
+
+    def test_encode_multiple(self):
+        embeddings = self.model.encode(["任意のテキスト"] * 3)
+        assert isinstance(embeddings, np.ndarray)
+        assert embeddings.shape == (3, OUTPUT_DIM)
+
+    def test_get_output_dim(self):
+        assert self.model.get_output_dim() == OUTPUT_DIM