diff --git a/fastfield_codecs/src/lib.rs b/fastfield_codecs/src/lib.rs
index a8d907ed6..0a3f24d12 100644
--- a/fastfield_codecs/src/lib.rs
+++ b/fastfield_codecs/src/lib.rs
@@ -94,15 +94,15 @@ mod tests {
         data: &[u64],
         name: &str,
     ) -> (f32, f32) {
-        if !S::is_applicable(&data, crate::tests::stats_from_vec(&data)) {
+        if !S::is_applicable(&data, crate::tests::stats_from_vec(data)) {
             return (f32::MAX, 0.0);
         }
-        let estimation = S::estimate(&data, crate::tests::stats_from_vec(&data));
+        let estimation = S::estimate(&data, crate::tests::stats_from_vec(data));
         let mut out = vec![];
         S::serialize(
             &mut out,
             &data,
-            crate::tests::stats_from_vec(&data),
+            crate::tests::stats_from_vec(data),
             data.iter().cloned(),
             data.iter().cloned(),
         )
@@ -119,7 +119,7 @@ mod tests {
             }
         }
         let actual_compression = data.len() as f32 / out.len() as f32;
-        return (estimation, actual_compression);
+        (estimation, actual_compression)
     }
     pub fn get_codec_test_data_sets() -> Vec<(Vec<u64>, &'static str)> {
         let mut data_and_names = vec![];
diff --git a/src/collector/facet_collector.rs b/src/collector/facet_collector.rs
index 79b764400..24200b7de 100644
--- a/src/collector/facet_collector.rs
+++ b/src/collector/facet_collector.rs
@@ -297,10 +297,8 @@ impl Collector for FacetCollector {
                                 if depth == collapse_depth + 1 {
                                     collapsed_id = collapse_facet_ords.len();
                                     collapse_facet_ords.push(facet_streamer.term_ord());
-                                    collapse_mapping.push(collapsed_id);
-                                } else {
-                                    collapse_mapping.push(collapsed_id);
                                 }
+                                collapse_mapping.push(collapsed_id);
                             }
                             break;
                         }
diff --git a/src/lib.rs b/src/lib.rs
index 2d30bb4b3..8afda7f11 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,6 +1,13 @@
 #![doc(html_logo_url = "http://fulmicoton.com/tantivy-logo/tantivy-logo.png")]
 #![cfg_attr(all(feature = "unstable", test), feature(test))]
-#![cfg_attr(feature = "cargo-clippy", allow(clippy::module_inception))]
+#![cfg_attr(
+    feature = "cargo-clippy",
+    allow(
+        clippy::module_inception,
+        clippy::needless_range_loop,
+        clippy::bool_assert_comparison
+    )
+)]
 #![doc(test(attr(allow(unused_variables), deny(warnings))))]
 #![warn(missing_docs)]
 
diff --git a/src/query/phrase_query/phrase_weight.rs b/src/query/phrase_query/phrase_weight.rs
index 273fff777..4263bcdbd 100644
--- a/src/query/phrase_query/phrase_weight.rs
+++ b/src/query/phrase_query/phrase_weight.rs
@@ -48,8 +48,8 @@ impl PhraseWeight {
     ) -> crate::Result<Option<PhraseScorer<SegmentPostings>>> {
         let similarity_weight = self.similarity_weight.boost_by(boost);
         let fieldnorm_reader = self.fieldnorm_reader(reader)?;
+        let mut term_postings_list = Vec::new();
         if reader.has_deletes() {
-            let mut term_postings_list = Vec::new();
             for &(offset, ref term) in &self.phrase_terms {
                 if let Some(postings) = reader
                     .inverted_index(term.field())?
@@ -60,14 +60,7 @@ impl PhraseWeight {
                     return Ok(None);
                 }
             }
-            Ok(Some(PhraseScorer::new(
-                term_postings_list,
-                similarity_weight,
-                fieldnorm_reader,
-                self.scoring_enabled,
-            )))
         } else {
-            let mut term_postings_list = Vec::new();
             for &(offset, ref term) in &self.phrase_terms {
                 if let Some(postings) = reader
                     .inverted_index(term.field())?
@@ -78,13 +71,13 @@ impl PhraseWeight {
                     return Ok(None);
                 }
             }
-            Ok(Some(PhraseScorer::new(
-                term_postings_list,
-                similarity_weight,
-                fieldnorm_reader,
-                self.scoring_enabled,
-            )))
         }
+        Ok(Some(PhraseScorer::new(
+            term_postings_list,
+            similarity_weight,
+            fieldnorm_reader,
+            self.scoring_enabled,
+        )))
     }
 }
 
diff --git a/src/query/term_query/term_scorer.rs b/src/query/term_query/term_scorer.rs
index c1afd39b8..27220a10a 100644
--- a/src/query/term_query/term_scorer.rs
+++ b/src/query/term_query/term_scorer.rs
@@ -194,8 +194,8 @@ mod tests {
                   .collect();
 
          let mut fieldnorms: Vec<u32> = vec![];
-         for i in 0..term_doc_freq {
-             let (tf, num_extra_terms) = term_freqs_fieldnorms[i];
+         for item in term_freqs_fieldnorms.iter().take(term_doc_freq) {
+             let (tf, num_extra_terms) = item;
              fieldnorms.push(tf + num_extra_terms);
          }
          let average_fieldnorm = fieldnorms