diff --git a/sleap_io/model/labels.py b/sleap_io/model/labels.py
index 67dea5c..3328c44 100644
--- a/sleap_io/model/labels.py
+++ b/sleap_io/model/labels.py
@@ -660,13 +660,19 @@ def make_training_splits(
         labels.suggestions = []
         labels.clean()
 
-        # Make splits.
+        # Make train split.
         labels_train, labels_rest = labels.split(n_train, seed=seed)
+
+        # Make test split.
         if n_test is not None:
             if n_test < 1:
                 n_test = (n_test * len(labels)) / len(labels_rest)
             labels_test, labels_rest = labels_rest.split(n=n_test, seed=seed)
-        if n_val is not None:
+        else:
+            labels_test = labels_rest
+
+        # Make val split.
+        if n_val is not None or (isinstance(n_val, float) and n_val == 1.0):
             if n_val < 1:
                 n_val = (n_val * len(labels)) / len(labels_rest)
             labels_val, _ = labels_rest.split(n=n_val, seed=seed)