diff --git a/.vscode/tasks.json b/.vscode/tasks.json
index a8754a8..6b2f4cb 100644
--- a/.vscode/tasks.json
+++ b/.vscode/tasks.json
@@ -31,6 +31,16 @@
 			"problemMatcher": [],
 			"label": "npm: test",
 			"detail": "pta tests/*.mjs"
+		},
+		{
+			"type": "npm",
+			"script": "test:watch",
+			"group": "test",
+			"problemMatcher": [],
+			"label": "npm: test:watch",
+			// https://crates.io/crates/watchexec-cli
+			"detail": "watchexec --filter \"tests/*.res\" \"npx pta tests/*.mjs\"",
+			"isBackground": true
 		}
 	]
 }
diff --git a/package.json b/package.json
index ed57ed2..34b5062 100644
--- a/package.json
+++ b/package.json
@@ -11,6 +11,7 @@
     "res:clean": "rescript clean",
     "res:dev": "rescript -w",
     "test": "pta tests/*.mjs",
+    "test:watch": "watchexec --filter \"tests/*.res\" \"npx pta tests/*.mjs\"",
     "format": "rescript format -all",
     "package": "esbuild src/Index.res.mjs --outfile=dist/index.js --bundle --platform=node --target=node20",
     "all": "npm run res:build && npm run test && npm run format && npm run package"