diff --git a/src/cli.rs b/src/cli.rs
index 97b0ffe..d925c50 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -462,7 +462,7 @@ pub struct Opts {
 
     /// Set number of threads to use for searching & executing (default: number
     /// of available CPU cores)
-    #[arg(long, short = 'j', value_name = "num", hide_short_help = true, value_parser = 1..)]
+    #[arg(long, short = 'j', value_name = "num", hide_short_help = true, value_parser = clap::value_parser!(u32).range(1..))]
     pub threads: Option<u32>,
 
     /// Milliseconds to buffer before streaming search results to console
diff --git a/tests/tests.rs b/tests/tests.rs
index 4d5b151..1cc561f 100644
--- a/tests/tests.rs
+++ b/tests/tests.rs
@@ -2066,6 +2066,14 @@ fn test_list_details() {
     te.assert_success_and_get_output(".", &["--list-details"]);
 }
 
+#[test]
+fn test_single_and_multithreaded_execution() {
+    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);
+
+    te.assert_output(&["--threads=1", "a.foo"], "a.foo");
+    te.assert_output(&["--threads=16", "a.foo"], "a.foo");
+}
+
 /// Make sure that fd fails if numeric arguments can not be parsed
 #[test]
 fn test_number_parsing_errors() {