diff --git a/package.json b/package.json
index e21f0e5..20cfb23 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
     "node": ">=6"
   },
   "dependencies": {
-    "prettier": "azz/prettier#f6d0b5fe"
+    "prettier": "prettier/prettier#ee148bfdeda373445ac9b67338cbae3df10a6576"
   },
   "devDependencies": {
     "eslint": "^4.14.0",
diff --git a/tests_config/run_spec.js b/tests_config/run_spec.js
index dcfa3d5..9c3cbe2 100644
--- a/tests_config/run_spec.js
+++ b/tests_config/run_spec.js
@@ -3,7 +3,6 @@
 const fs = require("fs");
 const extname = require("path").extname;
 const prettier = require("prettier");
-const plugin = require("../src");
 const massageAST = require("prettier/src/common/clean-ast").massageAST;
 
 const AST_COMPARE = process.env["AST_COMPARE"];
@@ -32,7 +31,7 @@ function run_spec(dirname, parsers, options) {
     ) {
       const source = read(path).replace(/\r\n/g, "\n");
 
-      const mergedOptions = Object.assign(mergeDefaultOptions(options || {}), {
+      const mergedOptions = Object.assign({}, options, {
         parser: parsers[0]
       });
       const output = prettyprint(source, path, mergedOptions);
@@ -105,7 +104,7 @@ function stripLocation(ast) {
 }
 
 function parse(string, opts) {
-  return stripLocation(plugin.parsers.python.parse(string, {}, opts));
+  return stripLocation(prettier.__debug.parse(string, opts));
 }
 
 function prettyprint(src, filename, options) {
@@ -135,12 +134,3 @@ function raw(string) {
   }
   return { [Symbol.for("raw")]: string };
 }
-
-function mergeDefaultOptions(parserConfig) {
-  return Object.assign(
-    {
-      printWidth: 80
-    },
-    parserConfig
-  );
-}
diff --git a/yarn.lock b/yarn.lock
index eaad09b..538788c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1097,6 +1097,10 @@ fill-range@^2.1.0:
     repeat-element "^1.1.2"
     repeat-string "^1.5.2"
 
+find-project-root@1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/find-project-root/-/find-project-root-1.1.1.tgz#d242727a2d904725df5714f23dfdcdedda0b6ef8"
+
 find-up@^1.0.0:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/find-up/-/find-up-1.1.2.tgz#6b2e9822b1a2ce0a60ab64d610eccad53cb24d0f"
@@ -2457,16 +2461,6 @@ path-parse@^1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/path-parse/-/path-parse-1.0.5.tgz#3c1adf871ea9cd6c9431b6ea2bd74a0ff055c4c1"
 
-path-root-regex@^0.1.0:
-  version "0.1.2"
-  resolved "https://registry.yarnpkg.com/path-root-regex/-/path-root-regex-0.1.2.tgz#bfccdc8df5b12dc52c8b43ec38d18d72c04ba96d"
-
-path-root@0.1.1:
-  version "0.1.1"
-  resolved "https://registry.yarnpkg.com/path-root/-/path-root-0.1.1.tgz#9a4a6814cac1c0cd73360a95f32083c8ea4745b7"
-  dependencies:
-    path-root-regex "^0.1.0"
-
 path-type@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/path-type/-/path-type-1.1.0.tgz#59c44f7ee491da704da415da5a4070ba4f8fe441"
@@ -2578,9 +2572,9 @@ preserve@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/preserve/-/preserve-0.2.0.tgz#815ed1f6ebc65926f865b310c0713bcb3315ce4b"
 
-prettier@azz/prettier#f6d0b5fe:
+prettier@prettier/prettier#ee148bfdeda373445ac9b67338cbae3df10a6576:
   version "1.9.2"
-  resolved "https://codeload.github.com/azz/prettier/tar.gz/f6d0b5feceadbc460d05e5ee32ae50b2a071fa55"
+  resolved "https://codeload.github.com/prettier/prettier/tar.gz/ee148bfdeda373445ac9b67338cbae3df10a6576"
   dependencies:
     "@babel/code-frame" "7.0.0-beta.35"
     babylon "7.0.0-beta.34"
@@ -2595,6 +2589,7 @@ prettier@azz/prettier#f6d0b5fe:
     emoji-regex "6.5.1"
     escape-string-regexp "1.0.5"
     esutils "2.0.2"
+    find-project-root "1.1.1"
     flow-parser "0.59.0"
     get-stream "3.0.0"
     globby "6.1.0"
@@ -2607,7 +2602,6 @@ prettier@azz/prettier#f6d0b5fe:
     minimatch "3.0.4"
     minimist "1.2.0"
     parse5 "3.0.3"
-    path-root "0.1.1"
     postcss-less "1.1.3"
     postcss-media-query-parser "0.2.3"
     postcss-scss "1.0.2"
@@ -2615,7 +2609,7 @@ prettier@azz/prettier#f6d0b5fe:
     postcss-values-parser "1.3.1"
     remark-frontmatter "1.1.0"
     remark-parse "4.0.0"
-    resolve "^1.5.0"
+    resolve "1.5.0"
     semver "5.4.1"
     string-width "2.1.1"
     typescript "2.6.2"
@@ -2860,7 +2854,7 @@ resolve@1.1.7:
   version "1.1.7"
   resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.1.7.tgz#203114d82ad2c5ed9e8e0411b3932875e889e97b"
 
-resolve@^1.2.0, resolve@^1.5.0:
+resolve@1.5.0, resolve@^1.2.0:
   version "1.5.0"
   resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.5.0.tgz#1f09acce796c9a762579f31b2c1cc4c3cddf9f36"
   dependencies: