diff --git a/tests/test_openapi.py b/tests/test_openapi.py
index 76f33695f..d7f347809 100644
--- a/tests/test_openapi.py
+++ b/tests/test_openapi.py
@@ -83,6 +83,15 @@ def test_openapi_suggest_novocab(app_client):
     assert req.status_code == 503
 
 
+def test_openapi_suggest_emptybody(app_client):
+    data = {}
+    req = app_client.post(
+        "http://localhost:8000/v1/projects/dummy-fi/suggest", data=data
+    )
+    assert req.status_code == 400
+    assert req.json()["detail"] == "RequestBody is required"
+
+
 def test_openapi_suggest_batch(app_client):
     data = {"documents": [{"text": "A quick brown fox jumped over the lazy dog."}] * 32}
     req = app_client.post(