diff --git a/src/options/filter.rs b/src/options/filter.rs
index ad88ff7..75e10fe 100644
--- a/src/options/filter.rs
+++ b/src/options/filter.rs
@@ -295,7 +295,7 @@ mod test {
     mod ignore_patterns {
         use super::*;
         use std::iter::FromIterator;
-        use glob;
+        
 
         fn pat(string: &'static str) -> glob::Pattern {
             glob::Pattern::new(string).unwrap()
diff --git a/src/options/mod.rs b/src/options/mod.rs
index 5c060b6..c203176 100644
--- a/src/options/mod.rs
+++ b/src/options/mod.rs
@@ -228,14 +228,14 @@ pub mod test {
     /// both, then both should resolve to the same result.
     ///
     /// It returns a vector with one or two elements in.
-    /// These elements can then be tested with assert_eq or what have you.
+    /// These elements can then be tested with `assert_eq` or what have you.
     pub fn parse_for_test<T, F>(inputs: &[&str], args: &'static [&'static Arg], strictnesses: Strictnesses, get: F) -> Vec<T>
     where F: Fn(&MatchedFlags<'_>) -> T
     {
         use self::Strictnesses::*;
         use crate::options::parser::{Args, Strictness};
 
-        let bits = inputs.into_iter().map(OsStr::new).collect::<Vec<_>>();
+        let bits = inputs.iter().map(OsStr::new).collect::<Vec<_>>();
         let mut result = Vec::new();
 
         if strictnesses == Last || strictnesses == Both {
diff --git a/src/options/theme.rs b/src/options/theme.rs
index 010de4a..5d27173 100644
--- a/src/options/theme.rs
+++ b/src/options/theme.rs
@@ -130,18 +130,18 @@ mod terminal_test {
 
     impl MockVars {
         fn empty() -> MockVars {
-            return MockVars {
+            MockVars {
                 ls: "",
                 exa: "",
                 no_color: "",
-            };
+            }
         }
         fn with_no_color() -> MockVars {
-            return MockVars {
+            MockVars {
                 ls: "",
                 exa: "",
                 no_color: "true",
-            };
+            }
         }
     }
 
diff --git a/src/options/view.rs b/src/options/view.rs
index 41816fb..078d4a6 100644
--- a/src/options/view.rs
+++ b/src/options/view.rs
@@ -378,7 +378,7 @@ mod test {
 
         ($name:ident: $type:ident <- $inputs:expr; $stricts:expr => err $result:expr) => {
             /// Special macro for testing Err results.
-            /// This is needed because sometimes the Ok type doesn’t implement PartialEq.
+            /// This is needed because sometimes the Ok type doesn’t implement `PartialEq`.
             #[test]
             fn $name() {
                 for result in parse_for_test($inputs.as_ref(), TEST_ARGS, $stricts, |mf| $type::deduce(mf)) {
@@ -389,7 +389,7 @@ mod test {
 
         ($name:ident: $type:ident <- $inputs:expr; $stricts:expr => like $pat:pat) => {
             /// More general macro for testing against a pattern.
-            /// Instead of using PartialEq, this just tests if it matches a pat.
+            /// Instead of using `PartialEq`, this just tests if it matches a pat.
             #[test]
             fn $name() {
                 for result in parse_for_test($inputs.as_ref(), TEST_ARGS, $stricts, |mf| $type::deduce(mf)) {
diff --git a/src/output/render/blocks.rs b/src/output/render/blocks.rs
index 5745f8f..cd5182d 100644
--- a/src/output/render/blocks.rs
+++ b/src/output/render/blocks.rs
@@ -43,7 +43,7 @@ pub mod test {
         let blox = f::Blocks::None;
         let expected = TextCell::blank(Green.italic());
 
-        assert_eq!(expected, blox.render(&TestColours).into());
+        assert_eq!(expected, blox.render(&TestColours));
     }
 
 
@@ -52,6 +52,6 @@ pub mod test {
         let blox = f::Blocks::Some(3005);
         let expected = TextCell::paint_str(Red.blink(), "3005");
 
-        assert_eq!(expected, blox.render(&TestColours).into());
+        assert_eq!(expected, blox.render(&TestColours));
     }
 }
diff --git a/src/output/render/git.rs b/src/output/render/git.rs
index 3740d40..ae96e58 100644
--- a/src/output/render/git.rs
+++ b/src/output/render/git.rs
@@ -85,7 +85,7 @@ pub mod test {
             ].into(),
         };
 
-        assert_eq!(expected, stati.render(&TestColours).into())
+        assert_eq!(expected, stati.render(&TestColours))
     }
 
 
@@ -104,6 +104,6 @@ pub mod test {
             ].into(),
         };
 
-        assert_eq!(expected, stati.render(&TestColours).into())
+        assert_eq!(expected, stati.render(&TestColours))
     }
 }
diff --git a/src/output/render/inode.rs b/src/output/render/inode.rs
index 7737aa2..8bb3249 100644
--- a/src/output/render/inode.rs
+++ b/src/output/render/inode.rs
@@ -21,8 +21,8 @@ pub mod test {
 
     #[test]
     fn blocklessness() {
-        let io = f::Inode(1414213);
+        let io = f::Inode(1_414_213);
         let expected = TextCell::paint_str(Cyan.underline(), "1414213");
-        assert_eq!(expected, io.render(Cyan.underline()).into());
+        assert_eq!(expected, io.render(Cyan.underline()));
     }
 }
diff --git a/src/output/render/links.rs b/src/output/render/links.rs
index 19b5f18..612a5d3 100644
--- a/src/output/render/links.rs
+++ b/src/output/render/links.rs
@@ -52,7 +52,7 @@ pub mod test {
             contents: vec![ Blue.paint("1") ].into(),
         };
 
-        assert_eq!(expected, stati.render(&TestColours, &locale::Numeric::english()).into());
+        assert_eq!(expected, stati.render(&TestColours, &locale::Numeric::english()));
     }
 
     #[test]
@@ -67,7 +67,7 @@ pub mod test {
             contents: vec![ Blue.paint("3,005") ].into(),
         };
 
-        assert_eq!(expected, stati.render(&TestColours, &locale::Numeric::english()).into());
+        assert_eq!(expected, stati.render(&TestColours, &locale::Numeric::english()));
     }
 
     #[test]
@@ -82,6 +82,6 @@ pub mod test {
             contents: vec![ Blue.on(Red).paint("3,005") ].into(),
         };
 
-        assert_eq!(expected, stati.render(&TestColours, &locale::Numeric::english()).into());
+        assert_eq!(expected, stati.render(&TestColours, &locale::Numeric::english()));
     }
 }
diff --git a/src/output/render/octal.rs b/src/output/render/octal.rs
index 454f756..5bb64b5 100644
--- a/src/output/render/octal.rs
+++ b/src/output/render/octal.rs
@@ -40,7 +40,7 @@ pub mod test {
         let octal = f::OctalPermissions{ permissions: bits };
 
         let expected = TextCell::paint_str(Purple.bold(), "0755");
-        assert_eq!(expected, octal.render(Purple.bold()).into());
+        assert_eq!(expected, octal.render(Purple.bold()));
     }
 
     #[test]
@@ -54,7 +54,7 @@ pub mod test {
         let octal = f::OctalPermissions{ permissions: bits };
 
         let expected = TextCell::paint_str(Purple.bold(), "0644");
-        assert_eq!(expected, octal.render(Purple.bold()).into());
+        assert_eq!(expected, octal.render(Purple.bold()));
     }
 
     #[test]
@@ -68,7 +68,7 @@ pub mod test {
         let octal = f::OctalPermissions{ permissions: bits };
 
         let expected = TextCell::paint_str(Purple.bold(), "0600");
-        assert_eq!(expected, octal.render(Purple.bold()).into());
+        assert_eq!(expected, octal.render(Purple.bold()));
     }
 
     #[test]
@@ -82,7 +82,7 @@ pub mod test {
         let octal = f::OctalPermissions{ permissions: bits };
 
         let expected = TextCell::paint_str(Purple.bold(), "4777");
-        assert_eq!(expected, octal.render(Purple.bold()).into());
+        assert_eq!(expected, octal.render(Purple.bold()));
 
     }
 
@@ -97,7 +97,7 @@ pub mod test {
         let octal = f::OctalPermissions{ permissions: bits };
 
         let expected = TextCell::paint_str(Purple.bold(), "2777");
-        assert_eq!(expected, octal.render(Purple.bold()).into());
+        assert_eq!(expected, octal.render(Purple.bold()));
     }
 
     #[test]
@@ -111,6 +111,6 @@ pub mod test {
         let octal = f::OctalPermissions{ permissions: bits };
 
         let expected = TextCell::paint_str(Purple.bold(), "1777");
-        assert_eq!(expected, octal.render(Purple.bold()).into());
+        assert_eq!(expected, octal.render(Purple.bold()));
     }
 }
diff --git a/src/output/render/size.rs b/src/output/render/size.rs
index 5a3ad72..716cc48 100644
--- a/src/output/render/size.rs
+++ b/src/output/render/size.rs
@@ -153,7 +153,7 @@ pub mod test {
 
     #[test]
     fn file_bytes() {
-        let directory = f::Size::Some(1048576);
+        let directory = f::Size::Some(1_048_576);
         let expected = TextCell {
             width: DisplayWidth::from(9),
             contents: vec![
diff --git a/src/output/tree.rs b/src/output/tree.rs
index 5e27e20..c3bff43 100644
--- a/src/output/tree.rs
+++ b/src/output/tree.rs
@@ -253,7 +253,7 @@ mod iter_test {
     #[test]
     fn test_iteration() {
         let foos = &[ "first", "middle", "last" ];
-        let mut iter = TreeDepth::root().iterate_over(foos.into_iter());
+        let mut iter = TreeDepth::root().iterate_over(foos.iter());
 
         let next = iter.next().unwrap();
         assert_eq!(&"first", next.1);
@@ -273,7 +273,7 @@ mod iter_test {
     #[test]
     fn test_empty() {
         let nothing: &[usize] = &[];
-        let mut iter = TreeDepth::root().iterate_over(nothing.into_iter());
+        let mut iter = TreeDepth::root().iterate_over(nothing.iter());
         assert!(iter.next().is_none());
     }
 }