diff --git a/.github/import_test.py b/.github/import_test.py
index 9c26736e18..f7c3e9f858 100644
--- a/.github/import_test.py
+++ b/.github/import_test.py
@@ -46,7 +46,7 @@
         time_taken_list.append(time_taken)
 
     for time in time_taken_list:
-        if time > 2.5:
+        if time > 1.5:
             exceptions.append(f"Importing {import_statement} took too long: {time:.2f} seconds")
             break
 
diff --git a/src/spikeinterface/qualitymetrics/pca_metrics.py b/src/spikeinterface/qualitymetrics/pca_metrics.py
index bd23268b3b..2915cee8ec 100644
--- a/src/spikeinterface/qualitymetrics/pca_metrics.py
+++ b/src/spikeinterface/qualitymetrics/pca_metrics.py
@@ -667,6 +667,8 @@ def nearest_neighbors_noise_overlap(
     ----------
     Based on noise overlap metric described in [Chung]_
     """
+    from sklearn.decomposition import IncrementalPCA
+
     rng = np.random.default_rng(seed=seed)
 
     waveforms_ext = sorting_analyzer.get_extension("waveforms")