diff --git a/.gitattributes b/.gitattributes
index a252d3d74..f3e115a21 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1 +1,4 @@
 *.md linguist-detectable
+.vscode/*.json linguist-language=JSON-with-Comments
+
+test.json linguist-language=JSON-with-Comments
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 000000000..67bb9f45e
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,6 @@
+{
+	"files.associations": {
+		// jsonc test
+		"test.json": "jsonc"
+	}
+}
diff --git a/test.json b/test.json
new file mode 100644
index 000000000..99b434ee0
--- /dev/null
+++ b/test.json
@@ -0,0 +1,3 @@
+{
+    // hoge
+}