diff --git a/src/python/tests/test_fastmultigather.py b/src/python/tests/test_fastmultigather.py
index f31e6b03..69eab9cf 100644
--- a/src/python/tests/test_fastmultigather.py
+++ b/src/python/tests/test_fastmultigather.py
@@ -1179,7 +1179,7 @@ def test_simple_protein(runtmp):
         "-k",
         "19",
         "-o",
-        gather_out
+        gather_out,
     )
 
     all_df = pandas.read_csv(gather_out)
@@ -1187,7 +1187,7 @@ def test_simple_protein(runtmp):
         p_output = runtmp.output(os.path.join(qsig + ".prefetch.csv"))
         assert os.path.exists(p_output)
 
-        df = all_df[all_df['match_name'] == qsig]
+        df = all_df[all_df["match_name"] == qsig]
 
         assert len(df) == 1
         keys = set(df.keys())
@@ -1224,7 +1224,7 @@ def test_simple_dayhoff(runtmp):
         "-k",
         "19",
         "-o",
-        gather_out
+        gather_out,
     )
 
     all_df = pandas.read_csv(gather_out)
@@ -1232,7 +1232,7 @@ def test_simple_dayhoff(runtmp):
         p_output = runtmp.output(os.path.join(qsig + ".prefetch.csv"))
         assert os.path.exists(p_output)
 
-        df = all_df[all_df['match_name'] == qsig]
+        df = all_df[all_df["match_name"] == qsig]
 
         assert len(df) == 1
         keys = set(df.keys())
@@ -1269,7 +1269,7 @@ def test_simple_hp(runtmp):
         "-k",
         "19",
         "-o",
-        gather_out
+        gather_out,
     )
 
     all_df = pandas.read_csv(gather_out)
@@ -1277,7 +1277,7 @@ def test_simple_hp(runtmp):
         p_output = runtmp.output(os.path.join(qsig + ".prefetch.csv"))
         assert os.path.exists(p_output)
 
-        df = all_df[all_df['match_name'] == qsig]
+        df = all_df[all_df["match_name"] == qsig]
         assert len(df) == 1
         keys = set(df.keys())
         assert {
@@ -1949,7 +1949,7 @@ def test_create_empty_prefetch_results(runtmp):
         "--create-empty-results",
         "-o",
         gather_out,
-        in_directory=runtmp.output("")
+        in_directory=runtmp.output(""),
     )
 
     print(os.listdir(runtmp.output("")))
diff --git a/src/utils/mod.rs b/src/utils/mod.rs
index 812a91af..2ee44c84 100644
--- a/src/utils/mod.rs
+++ b/src/utils/mod.rs
@@ -82,7 +82,7 @@ pub fn prefetch(
             let searchsig = &result.minhash;
             let overlap = searchsig.count_common(query_mh, false);
             if let Ok(overlap) = overlap {
-                if overlap >0 && overlap >= threshold_hashes {
+                if overlap > 0 && overlap >= threshold_hashes {
                     let result = PrefetchResult { overlap, ..result };
                     mm = Some(result);
                 }