diff --git a/.idea/inspectionProfiles/Project_Default.xml b/.idea/inspectionProfiles/Project_Default.xml
index 725f4da..8778a14 100644
--- a/.idea/inspectionProfiles/Project_Default.xml
+++ b/.idea/inspectionProfiles/Project_Default.xml
@@ -3,5 +3,8 @@
     <option name="myName" value="Project Default" />
     <inspection_tool class="DuplicatedCode" enabled="false" level="WEAK WARNING" enabled_by_default="false" />
     <inspection_tool class="RegExpRepeatedSpace" enabled="true" level="INFORMATION" enabled_by_default="true" />
+    <inspection_tool class="ShellCheck" enabled="true" level="ERROR" enabled_by_default="true">
+      <shellcheck_settings value="SC2016" />
+    </inspection_tool>
   </profile>
 </component>
\ No newline at end of file
diff --git a/Cargo.lock b/Cargo.lock
index a5f3c5a..c7b11ad 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,5 +1,7 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "arrayvec"
 version = "0.5.2"
@@ -105,9 +107,9 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-deque"
-version = "0.8.0"
+version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94af6efb46fef72616855b036a624cf27ba656ffc9be1b9a3c931cfc7749a9a9"
+checksum = "6455c0ca19f0d2fbf751b908d5c55c1f5cbc65e03c4225427254b46890bdde1e"
 dependencies = [
  "cfg-if",
  "crossbeam-epoch",
@@ -549,18 +551,18 @@ checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
 
 [[package]]
 name = "serde"
-version = "1.0.126"
+version = "1.0.127"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec7505abeacaec74ae4778d9d9328fe5a5d04253220a85c4ee022239fc996d03"
+checksum = "f03b9878abf6d14e6779d3f24f07b2cfa90352cfec4acc5aab8f1ac7f146fae8"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.126"
+version = "1.0.127"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "963a7dbc9895aeac7ac90e74f34a5d5261828f79df35cbed41e10189d3804d43"
+checksum = "a024926d3432516606328597e0f224a51355a493b49fdd67e9209187cbe55ecc"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/clippy.sh b/clippy.sh
index 441dbdb..08e6a8d 100755
--- a/clippy.sh
+++ b/clippy.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 set -e
-source $HOME/.cargo/env || true
+source "$HOME"/.cargo/env || true
 
 _extra=""
 _ver=""
diff --git a/src/main.rs b/src/main.rs
index 8056724..c0076e2 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -17,7 +17,6 @@
 #![forbid(unsafe_code)]
 #![warn(trivial_casts, unused_lifetimes, unused_qualifications)]
 
-use std::ffi::OsStr;
 use std::io::{stdout, BufWriter, Write};
 use std::path::Path;
 use std::process::exit;
@@ -213,7 +212,7 @@ fn wanted_file(
 		return true;
 	}
 
-	if let Some(ext) = extension_from_path(entry.path()) {
+	if let Some(ext) = entry.path().extension() {
 		// file has extension - discard invalid UTF-8 and normalise it to lowercase.
 		let ext = ext.to_string_lossy().to_lowercase();
 		let ext = ext.as_str();
@@ -231,9 +230,6 @@ fn wanted_file(
 	}
 }
 
-/// Given a file path, returns its extension, using [`std::path::Path::extension`].
-fn extension_from_path(path: &Path) -> Option<&OsStr> { path.extension() }
-
 /// Inspects the given entry, returning a [`Findings`] on success and a [`ScanError`] on failure.
 ///
 /// In the event of an IO error, the returned [`ScanError`] will be of type [`ScanError::File`]. Otherwise, a
@@ -254,7 +250,7 @@ fn scan_file(entry: &DirEntry, canonical_paths: bool) -> Result<Findings, ScanEr
 	// set of known extensions for the given mimetype
 	let known_exts = inspectors::mime_extension_lookup(result.essence_str().into());
 	// file extension for this particular file
-	let entry_ext = extension_from_path(path);
+	let entry_ext = path.extension();
 
 	let valid = match known_exts {
 		// there is a known set of extensions for this mimetype, and the file has an extension
diff --git a/src/tests/mod.rs b/src/tests/mod.rs
index 0a40e79..d8038fc 100644
--- a/src/tests/mod.rs
+++ b/src/tests/mod.rs
@@ -3,7 +3,7 @@ use crate::formats::{Format, PowerShell, Shell};
 use crate::inspectors::{mime_extension_lookup, BUF_SIZE};
 use crate::mime_db::MimeDb;
 use crate::string_type::String;
-use crate::{extension_from_path, scan_directory, scan_from_walkdir};
+use crate::{scan_directory, scan_from_walkdir};
 
 use crate::parameters::Parameters;
 use clap::Clap;
@@ -49,7 +49,7 @@ fn get_ext() {
 	ext_checks.insert(Path::new(".hidden"), None);
 
 	for (path, ext) in ext_checks {
-		assert_eq!(extension_from_path(path), ext);
+		assert_eq!(path.extension(), ext);
 	}
 }
 
@@ -142,7 +142,7 @@ fn simple_directory() {
 		if !result.valid {
 			// the only invalid file detected should be "wrong.jpg", which is a misnamed png file
 			// 1. ensure detected extension is "jpg"
-			assert_eq!(extension_from_path(result.file.as_path()).unwrap(), OsStr::new("jpg"));
+			assert_eq!(result.file.as_path().extension().unwrap(), OsStr::new("jpg"));
 			// 2. ensure detected mime type is IMAGE_PNG
 			assert_eq!(result.mime, IMAGE_PNG);
 			// 3. ensure the recommended extension for "wrong.jpg" is "png"
@@ -160,11 +160,10 @@ fn simple_directory() {
 		// make sure the guessed mimetype is correct based on the extension of the scanned file
 		// because we already know that the extensions match the mimetype (as we created these files ourselves earlier in
 		// the test), all files with the "jpg" extension should be IMAGE_JPEGs, etc.
-		let ext = extension_from_path(result.file.as_path());
-		assert!(ext.is_some());
+		let ext = result.file.as_path().extension().unwrap();
 		assert_eq!(
 			result.mime,
-			match ext.unwrap().to_string_lossy().borrow() {
+			match ext.to_string_lossy().borrow() {
 				"jpg" | "jpeg" => IMAGE_JPEG,
 				"png" => IMAGE_PNG,
 				"pdf" => APPLICATION_PDF,
@@ -173,7 +172,7 @@ fn simple_directory() {
 			},
 			"Incorrect MIME type detected - got {:?} for a {:?} file",
 			result.mime,
-			ext.unwrap()
+			ext
 		);
 	}
 }
diff --git a/src/utils.rs b/src/utils.rs
index 1feb668..2f1630c 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -23,7 +23,7 @@ static CLAP_LONG_VERSION: OnceCell<String> = OnceCell::new();
 
 /// Sets [`CLAP_VERSION`] to be the version defined in Cargo.toml, prefixed with a v (e.g. "v0.3.1"), then returns it as
 /// a String.
-pub fn clap_version() -> &'static str { CLAP_VERSION.get_or_init(|| format!("v{}", VERSION.unwrap_or("???"))) }
+pub fn clap_version() -> &'static str { CLAP_VERSION.get_or_init(|| String::from("v") + VERSION.unwrap_or("???")) }
 
 /// Sets [`CLAP_LONG_VERSION`] to be similar to [`CLAP_VERSION`], followed by the chosen backend in parentheses (e.g.
 /// "v0.3.1 (XDG-Mime backend)"), then returns it as a String.