diff --git a/libclamav_rust/build.rs b/libclamav_rust/build.rs
index beee20d132..f71ca8e9a3 100644
--- a/libclamav_rust/build.rs
+++ b/libclamav_rust/build.rs
@@ -160,7 +160,7 @@ fn execute_bindgen() -> Result<(), &'static str> {
 /// Use cbindgen to generate C-header's for Rust static libraries.
 fn execute_cbindgen() -> Result<(), &'static str> {
     let crate_dir = env::var("CARGO_MANIFEST_DIR").or(Err("CARGO_MANIFEST_DIR not specified"))?;
-    let build_dir = PathBuf::from(env::var("CARGO_TARGET_DIR").unwrap_or(".".into()));
+    let build_dir = PathBuf::from(env::var("CARGO_TARGET_DIR").unwrap_or_else(|_| ".".into()));
     let outfile_path = build_dir.join(C_HEADER_OUTPUT);
 
     // Useful for build diagnostics
@@ -234,7 +234,7 @@ fn search_and_link_lib(environment_variable: &str) -> Result<bool, &'static str>
     eprintln!("  - requesting that rustc link {:?}", &parsed_path.libname);
     println!("cargo:rustc-link-lib={}", parsed_path.libname);
 
-    return Ok(true);
+    Ok(true)
 }
 
 struct ParsedLibraryPath {
@@ -255,7 +255,7 @@ fn parse_lib_path<'a>(path: &'a str) -> Result<ParsedLibraryPath, &'static str>
     // This can't fail because it came from a &str
     let dir = path
         .parent()
-        .unwrap_or(Path::new("."))
+        .unwrap_or_else(|| Path::new("."))
         .to_str()
         .unwrap()
         .to_owned();
diff --git a/libclamav_rust/src/cdiff.rs b/libclamav_rust/src/cdiff.rs
index f8d3383c0b..8c3386cf5b 100644
--- a/libclamav_rust/src/cdiff.rs
+++ b/libclamav_rust/src/cdiff.rs
@@ -185,11 +185,9 @@ impl<'a> DelOp<'a> {
         Ok(DelOp {
             line_no: iter
                 .next()
-                .ok_or_else(|| CdiffError::NoMoreData("line_no"))?
+                .ok_or(CdiffError::NoMoreData("line_no"))?
                 .parse::<usize>()?,
-            del_line: iter
-                .next()
-                .ok_or_else(|| CdiffError::NoMoreData("del_line"))?,
+            del_line: iter.next().ok_or(CdiffError::NoMoreData("del_line"))?,
         })
     }
 }
@@ -210,22 +208,18 @@ impl<'a> MoveOp<'a> {
         let mut iter = data.split_whitespace();
 
         Ok(MoveOp {
-            src: iter.next().ok_or_else(|| CdiffError::NoMoreData("src"))?,
-            dst: iter.next().ok_or_else(|| CdiffError::NoMoreData("dst"))?,
+            src: iter.next().ok_or(CdiffError::NoMoreData("src"))?,
+            dst: iter.next().ok_or(CdiffError::NoMoreData("dst"))?,
             start_line_no: iter
                 .next()
-                .ok_or_else(|| CdiffError::NoMoreData("start_line_no"))?
+                .ok_or(CdiffError::NoMoreData("start_line_no"))?
                 .parse::<usize>()?,
-            start_line: iter
-                .next()
-                .ok_or_else(|| CdiffError::NoMoreData("start_line"))?,
+            start_line: iter.next().ok_or(CdiffError::NoMoreData("start_line"))?,
             end_line_no: iter
                 .next()
-                .ok_or_else(|| CdiffError::NoMoreData("end_line_no"))?
+                .ok_or(CdiffError::NoMoreData("end_line_no"))?
                 .parse::<usize>()?,
-            end_line: iter
-                .next()
-                .ok_or_else(|| CdiffError::NoMoreData("end_line"))?,
+            end_line: iter.next().ok_or(CdiffError::NoMoreData("end_line"))?,
         })
     }
 }
@@ -245,14 +239,10 @@ impl<'a> XchgOp<'a> {
         Ok(XchgOp {
             line_no: iter
                 .next()
-                .ok_or_else(|| CdiffError::NoMoreData("line_no"))?
+                .ok_or(CdiffError::NoMoreData("line_no"))?
                 .parse::<usize>()?,
-            orig_line: iter
-                .next()
-                .ok_or_else(|| CdiffError::NoMoreData("orig_line"))?,
-            new_line: iter
-                .next()
-                .ok_or_else(|| CdiffError::NoMoreData("new_line"))?,
+            orig_line: iter.next().ok_or(CdiffError::NoMoreData("orig_line"))?,
+            new_line: iter.next().ok_or(CdiffError::NoMoreData("new_line"))?,
         })
     }
 }
@@ -555,7 +545,7 @@ fn cmd_open(ctx: &mut Context, db_name: std::string::String) -> Result<(), Cdiff
 /// Set up Context structure with data parsed from command add
 fn cmd_add(ctx: &mut Context, signature: std::string::String) -> Result<(), CdiffError> {
     // Test for add without an open db
-    if !ctx.open_db.is_some() {
+    if ctx.open_db.is_none() {
         return Err(CdiffError::NoDBForAction("ADD"));
     }
     ctx.additions.push(signature);
@@ -566,7 +556,7 @@ fn cmd_add(ctx: &mut Context, signature: std::string::String) -> Result<(), Cdif
 /// Set up Context structure with data parsed from command delete
 fn cmd_del(ctx: &mut Context, del_op: DelOp) -> Result<(), CdiffError> {
     // Test for add without an open db
-    if !ctx.open_db.is_some() {
+    if ctx.open_db.is_none() {
         return Err(CdiffError::NoDBForAction("DEL"));
     }
 
@@ -584,7 +574,7 @@ fn cmd_del(ctx: &mut Context, del_op: DelOp) -> Result<(), CdiffError> {
 /// Set up Context structure with data parsed from command exchange
 fn cmd_xchg(ctx: &mut Context, xchg_op: XchgOp) -> Result<(), CdiffError> {
     // Test for add without an open db
-    if !ctx.open_db.is_some() {
+    if ctx.open_db.is_none() {
         return Err(CdiffError::NoDBForAction("XCHG"));
     }
 
@@ -690,7 +680,7 @@ fn cmd_close(ctx: &mut Context) -> Result<(), CdiffError> {
     let open_db = ctx
         .open_db
         .take()
-        .ok_or_else(|| CdiffError::NoDBForAction("CLOSE"))?;
+        .ok_or(CdiffError::NoDBForAction("CLOSE"))?;
 
     let mut edits = ctx.edits.iter_mut();
     let mut next_edit = edits.next();
diff --git a/libclamav_rust/src/logging.rs b/libclamav_rust/src/logging.rs
index ca6835e911..13a09cca2b 100644
--- a/libclamav_rust/src/logging.rs
+++ b/libclamav_rust/src/logging.rs
@@ -74,7 +74,7 @@ mod tests {
     #[test]
     fn parse_move_works() {
         let init_status = clrs_log_init();
-        assert!(init_status == true);
+        assert!(init_status);
         debug!("Hello");
         info!("darkness");
         warn!("my old");