diff --git a/optimizerapi/optimizer.py b/optimizerapi/optimizer.py
index bf34811..fdd115c 100644
--- a/optimizerapi/optimizer.py
+++ b/optimizerapi/optimizer.py
@@ -194,7 +194,7 @@ def process_result(result, optimizer, dimensions, cfg, extras, data, space):
         experiment_suggestion_count = extras["experimentSuggestionCount"]
 
     next_exp = optimizer.ask(n_points=experiment_suggestion_count)
-    if not any(isinstance(x, list) for x in next_exp): next_exp = [next_exp]
+    if len(next_exp) > 0 and not any(isinstance(x, list) for x in next_exp): next_exp = [next_exp]
     result_details["next"] = round_to_length_scales(next_exp, optimizer.space)
 
     if len(data) >= cfg["initialPoints"]:
diff --git a/tests/test_optimizer.py b/tests/test_optimizer.py
index 41cdfa3..9394f2c 100644
--- a/tests/test_optimizer.py
+++ b/tests/test_optimizer.py
@@ -44,7 +44,7 @@ def validateResult(result):
     assert "result" in result
     assert "models" in result["result"]
     assert "next" in result["result"]
-    assert len(result["result"]["next"]) == len(sampleConfig["space"])
+    assert all(len(x) == len(sampleConfig["space"]) for x in result["result"]["next"])
     assert "pickled" in result["result"]
     assert len(result["result"]["pickled"]) > 1
     if len(result["result"]["models"]) > 0: