diff --git a/performance-metrics/src/main.rs b/performance-metrics/src/main.rs
index 9bbade5c5..f570a3109 100644
--- a/performance-metrics/src/main.rs
+++ b/performance-metrics/src/main.rs
@@ -1783,15 +1783,17 @@ fn main() {
         .arg(
             Arg::new("test-filter")
                 .long("test-filter")
-                .help("Filter metrics tests to run based on provided keywords")
+                .help("Filter metrics tests to run based on provided keywords (comma-separated)")
                 .num_args(1)
+                .value_delimiter(',')
                 .required(false),
         )
         .arg(
             Arg::new("test-exclude")
                 .long("test-exclude")
-                .help("Exclude metrics tests matching the provided keywords")
+                .help("Exclude metrics tests matching the provided keywords (comma-separated)")
                 .num_args(1)
+                .value_delimiter(',')
                 .required(false),
         )
         .arg(