diff --git a/.vscode/extensions.json b/.vscode/extensions.json
new file mode 100644
index 0000000..080e70d
--- /dev/null
+++ b/.vscode/extensions.json
@@ -0,0 +1,10 @@
+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}
diff --git a/platformio.ini b/platformio.ini
index 533df33..767fbe4 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -33,6 +33,7 @@ build_type = test
 test_framework = doctest
 test_build_src = true
 lib_deps = 
-	bblanchon/ArduinoJson @ ^7.0.2
+	bblanchon/ArduinoJson@^7.0.2
+	doctest/doctest@^2.4.9
 build_flags = -std=gnu++17 -I ${platformio.test_dir}/helpers
 debug_test = test_template