diff --git a/src/clean-ast.js b/src/clean-ast.js
index 24689697b..f1b77fcbc 100644
--- a/src/clean-ast.js
+++ b/src/clean-ast.js
@@ -51,7 +51,9 @@ function massageAST(ast) {
       "source",
       "before",
       "after",
-      "trailingComma"
+      "trailingComma",
+      "parent",
+      "prev"
     ].forEach(name => {
       delete newObj[name];
     });
diff --git a/tests_config/run_spec.js b/tests_config/run_spec.js
index ca3f9f2cb..f846d5cd4 100644
--- a/tests_config/run_spec.js
+++ b/tests_config/run_spec.js
@@ -96,7 +96,9 @@ function stripLocation(ast) {
         key === "loc" ||
         key === "range" ||
         key === "raw" ||
-        key === "comments"
+        key === "comments" ||
+        key === "parent" ||
+        key === "prev"
       ) {
         continue;
       }