diff --git a/src/spikeinterface/qualitymetrics/quality_metric_calculator.py b/src/spikeinterface/qualitymetrics/quality_metric_calculator.py
index 123293f313..8a754fc7da 100644
--- a/src/spikeinterface/qualitymetrics/quality_metric_calculator.py
+++ b/src/spikeinterface/qualitymetrics/quality_metric_calculator.py
@@ -165,7 +165,7 @@ def _compute_metrics(self, sorting_analyzer, unit_ids=None, verbose=False, metri
 
         import pandas as pd
 
-        metrics = pd.DataFrame(index=sorting_analyzer.sorting.unit_ids)
+        metrics = pd.DataFrame(index=sorting_analyzer.unit_ids)
 
         # simple metrics not based on PCs
         for metric_name in metric_names:
diff --git a/src/spikeinterface/qualitymetrics/tests/test_metrics_functions.py b/src/spikeinterface/qualitymetrics/tests/test_metrics_functions.py
index 77909798a3..ee5d5849b3 100644
--- a/src/spikeinterface/qualitymetrics/tests/test_metrics_functions.py
+++ b/src/spikeinterface/qualitymetrics/tests/test_metrics_functions.py
@@ -286,10 +286,10 @@ def test_unit_id_order_independence(small_sorting_analyzer):
         small_sorting_analyzer_2, metric_names=get_quality_metric_list(), qm_params=qm_params
     )
 
-    for metric, metric_1_data in quality_metrics_1.items():
-        assert quality_metrics_2[metric][2] == metric_1_data["#3"]
-        assert quality_metrics_2[metric][7] == metric_1_data["#9"]
-        assert quality_metrics_2[metric][1] == metric_1_data["#4"]
+    for metric, metric_2_data in quality_metrics_2.items():
+        assert quality_metrics_1[metric]["#3"] == metric_2_data[2]
+        assert quality_metrics_1[metric]["#9"] == metric_2_data[7]
+        assert quality_metrics_1[metric]["#4"] == metric_2_data[1]
 
 
 def _sorting_analyzer_simple():