diff --git a/src/multiparser.js b/src/multiparser.js
index 8c24a1ef0..62963433e 100644
--- a/src/multiparser.js
+++ b/src/multiparser.js
@@ -14,6 +14,9 @@ function printSubtree(subtreeParser, path, print, options) {
   next.options = Object.assign({}, options, next.options, {
     originalText: next.text
   });
+  if (next.options.parser === "json") {
+    next.options.trailingComma = "none";
+  }
   const ast = require("./parser").parse(next.text, next.options);
   const astComments = ast.comments;
   delete ast.comments;
diff --git a/tests/multiparser_markdown_json/__snapshots__/jsfmt.spec.js.snap b/tests/multiparser_markdown_json/__snapshots__/jsfmt.spec.js.snap
new file mode 100644
index 000000000..0093645dc
--- /dev/null
+++ b/tests/multiparser_markdown_json/__snapshots__/jsfmt.spec.js.snap
@@ -0,0 +1,16 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`trailing_comma.md 1`] = `
+\`\`\`json
+{
+  "foo": "bar"
+}
+\`\`\`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+\`\`\`json
+{
+  "foo": "bar"
+}
+\`\`\`
+
+`;
diff --git a/tests/multiparser_markdown_json/jsfmt.spec.js b/tests/multiparser_markdown_json/jsfmt.spec.js
new file mode 100644
index 000000000..c5099cdb8
--- /dev/null
+++ b/tests/multiparser_markdown_json/jsfmt.spec.js
@@ -0,0 +1 @@
+run_spec(__dirname, { parser: "markdown", trailingComma: "all" });
diff --git a/tests/multiparser_markdown_json/trailing_comma.md b/tests/multiparser_markdown_json/trailing_comma.md
new file mode 100644
index 000000000..7c992821b
--- /dev/null
+++ b/tests/multiparser_markdown_json/trailing_comma.md
@@ -0,0 +1,5 @@
+```json
+{
+  "foo": "bar"
+}
+```