diff --git a/justfile b/justfile
index 32874e5..c9288a7 100644
--- a/justfile
+++ b/justfile
@@ -1,6 +1,9 @@
 test: build
 	cargo test --lib
 
+filter PATTERN:
+	cargo test --lib {{PATTERN}}
+
 test-quine:
 	cargo run -- quine clean