diff --git a/justfile b/justfile
index 5c0edef4df..f146ed9b48 100644
--- a/justfile
+++ b/justfile
@@ -3,7 +3,7 @@ all: lint sync
 
 # Lint source typescript
 lint:
-    npm run lint -- --fix
+    npm run lint-fix
 
 # Sync generated files (javascript and PR checks)
 sync: build update-pr-checks
@@ -15,3 +15,16 @@ update-pr-checks:
 # Transpile typescript code into javascript
 build:
     npm run build
+
+# Build then run all the tests
+test: build
+    npm run test
+
+# Run the tests for a single file
+test_file filename: build
+    npx ava --verbose {{filename}}
+
+[doc("Refresh the .js build artefacts in the lib directory")]
+[confirm]
+refresh-lib:
+    rm -rf lib && npm run build