diff --git a/package.json b/package.json
index 2cd8ff1ce..737011602 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "test": "jest",
     "format": "./bin/prettier.js --write",
     "format:single": "npm run format -- src/printer.js",
-    "format:all": "npm run format -- index.js src/*.js bin/*.js",
+    "format:all": "npm run format -- index.js \"{src,bin,tests_config,scripts}/*.js\" \"tests/**/jsfmt.spec.js\"",
     "build:docs": "rollup -c docs/rollup.config.js"
   },
   "jest": {
diff --git a/scripts/sync-flow-tests.js b/scripts/sync-flow-tests.js
index 68a82f74f..c9eb65c45 100644
--- a/scripts/sync-flow-tests.js
+++ b/scripts/sync-flow-tests.js
@@ -36,7 +36,7 @@ function syncTests(syncDir) {
         "Couldn't find any files to copy.",
         `Please make sure that \`${syncDir}\` exists and contains the flow tests.`
       ].join("\n")
-    )
+    );
   }
 
   const specContents = specFiles.reduce((obj, specFile) => {
diff --git a/tests/arrow-call/jsfmt.spec.js b/tests/arrow-call/jsfmt.spec.js
index 220f446b5..9b85c446c 100644
--- a/tests/arrow-call/jsfmt.spec.js
+++ b/tests/arrow-call/jsfmt.spec.js
@@ -1,2 +1,2 @@
 run_spec(__dirname);
-run_spec(__dirname, { trailingComma: 'all' });
+run_spec(__dirname, { trailingComma: "all" });
diff --git a/tests/bracketSpacing/jsfmt.spec.js b/tests/bracketSpacing/jsfmt.spec.js
index bb1d92705..deb0fd82a 100644
--- a/tests/bracketSpacing/jsfmt.spec.js
+++ b/tests/bracketSpacing/jsfmt.spec.js
@@ -1,2 +1,2 @@
 run_spec(__dirname, null, ["typescript"]);
-run_spec(__dirname, { bracketSpacing: false }, ["typescript"]);
\ No newline at end of file
+run_spec(__dirname, { bracketSpacing: false }, ["typescript"]);
diff --git a/tests/es6modules/jsfmt.spec.js b/tests/es6modules/jsfmt.spec.js
index 668c3f6f4..0392b2151 100644
--- a/tests/es6modules/jsfmt.spec.js
+++ b/tests/es6modules/jsfmt.spec.js
@@ -1,3 +1,3 @@
 run_spec(__dirname);
 // FIXME export_default_function_declaration_async.js flow != babylon output
-run_spec(__dirname, { parser: "babylon" });
\ No newline at end of file
+run_spec(__dirname, { parser: "babylon" });
diff --git a/tests/export/jsfmt.spec.js b/tests/export/jsfmt.spec.js
index bb1d92705..deb0fd82a 100644
--- a/tests/export/jsfmt.spec.js
+++ b/tests/export/jsfmt.spec.js
@@ -1,2 +1,2 @@
 run_spec(__dirname, null, ["typescript"]);
-run_spec(__dirname, { bracketSpacing: false }, ["typescript"]);
\ No newline at end of file
+run_spec(__dirname, { bracketSpacing: false }, ["typescript"]);
diff --git a/tests/flow_comments/jsfmt.spec.js b/tests/flow_comments/jsfmt.spec.js
index 51588ad1e..4d7b83a70 100644
--- a/tests/flow_comments/jsfmt.spec.js
+++ b/tests/flow_comments/jsfmt.spec.js
@@ -1,3 +1,3 @@
 run_spec(__dirname);
 // FIXME arrow.js flow != babylon output
-run_spec(__dirname, { parser: "babylon" });
\ No newline at end of file
+run_spec(__dirname, { parser: "babylon" });
diff --git a/tests/flow_generic/jsfmt.spec.js b/tests/flow_generic/jsfmt.spec.js
index ab1508e8d..f2ad8bc30 100644
--- a/tests/flow_generic/jsfmt.spec.js
+++ b/tests/flow_generic/jsfmt.spec.js
@@ -1,2 +1,2 @@
 run_spec(__dirname, null, ["babylon"]);
-run_spec(__dirname, { trailingComma: 'all' }, ["babylon"]);
+run_spec(__dirname, { trailingComma: "all" }, ["babylon"]);
diff --git a/tests/flow_object_order/jsfmt.spec.js b/tests/flow_object_order/jsfmt.spec.js
index fc1bbd4e9..9b85c446c 100644
--- a/tests/flow_object_order/jsfmt.spec.js
+++ b/tests/flow_object_order/jsfmt.spec.js
@@ -1,2 +1,2 @@
 run_spec(__dirname);
-run_spec(__dirname, {trailingComma: 'all'});
+run_spec(__dirname, { trailingComma: "all" });
diff --git a/tests/jsx_escape/jsfmt.spec.js b/tests/jsx_escape/jsfmt.spec.js
index 69acff871..3de20299e 100644
--- a/tests/jsx_escape/jsfmt.spec.js
+++ b/tests/jsx_escape/jsfmt.spec.js
@@ -1,3 +1,3 @@
-run_spec(__dirname)
+run_spec(__dirname);
 // FIXME nbsp.js flow != babylon output, waiting for: https://github.com/babel/babylon/pull/344
 run_spec(__dirname, { parser: "babylon" });
diff --git a/tests/quotes/jsfmt.spec.js b/tests/quotes/jsfmt.spec.js
index 04f2867bd..17cade240 100644
--- a/tests/quotes/jsfmt.spec.js
+++ b/tests/quotes/jsfmt.spec.js
@@ -1,2 +1,2 @@
 run_spec(__dirname);
-run_spec(__dirname, { singleQuote: true });
\ No newline at end of file
+run_spec(__dirname, { singleQuote: true });
diff --git a/tests/tabWith/jsfmt.spec.js b/tests/tabWith/jsfmt.spec.js
index 8f2eb802c..1ec983a6b 100644
--- a/tests/tabWith/jsfmt.spec.js
+++ b/tests/tabWith/jsfmt.spec.js
@@ -1,2 +1,2 @@
 run_spec(__dirname);
-run_spec(__dirname, { tabWidth: 4 });
\ No newline at end of file
+run_spec(__dirname, { tabWidth: 4 });
diff --git a/tests/template_align/jsfmt.spec.js b/tests/template_align/jsfmt.spec.js
index 2e6e1e55e..27ef85081 100644
--- a/tests/template_align/jsfmt.spec.js
+++ b/tests/template_align/jsfmt.spec.js
@@ -1,2 +1,2 @@
 run_spec(__dirname, null, ["typescript"]);
-run_spec(__dirname, {useTabs: true, tabWidth: 8}, ["typescript"]);
+run_spec(__dirname, { useTabs: true, tabWidth: 8 }, ["typescript"]);
diff --git a/tests/ternaries/jsfmt.spec.js b/tests/ternaries/jsfmt.spec.js
index 129171846..84d257115 100644
--- a/tests/ternaries/jsfmt.spec.js
+++ b/tests/ternaries/jsfmt.spec.js
@@ -1,2 +1,2 @@
 run_spec(__dirname, null, ["typescript"]);
-run_spec(__dirname, { tabWidth: 4 }, ["typescript"]);
\ No newline at end of file
+run_spec(__dirname, { tabWidth: 4 }, ["typescript"]);
diff --git a/tests/typescript_as/jsfmt.spec.js b/tests/typescript_as/jsfmt.spec.js
index 379b0d723..bc085c48c 100644
--- a/tests/typescript_as/jsfmt.spec.js
+++ b/tests/typescript_as/jsfmt.spec.js
@@ -1 +1 @@
-run_spec(__dirname, {parser: "typescript"});
+run_spec(__dirname, { parser: "typescript" });
diff --git a/tests/typescript_tsx/jsfmt.spec.js b/tests/typescript_tsx/jsfmt.spec.js
index 379b0d723..bc085c48c 100644
--- a/tests/typescript_tsx/jsfmt.spec.js
+++ b/tests/typescript_tsx/jsfmt.spec.js
@@ -1 +1 @@
-run_spec(__dirname, {parser: "typescript"});
+run_spec(__dirname, { parser: "typescript" });
diff --git a/tests_config/run_spec.js b/tests_config/run_spec.js
index 447ddb964..7bed96ff0 100644
--- a/tests_config/run_spec.js
+++ b/tests_config/run_spec.js
@@ -5,7 +5,7 @@ const extname = require("path").extname;
 const prettier = require("../");
 const types = require("../src/ast-types");
 const parser = require("../src/parser");
-const massageAST = require('../src/clean-ast.js').massageAST;
+const massageAST = require("../src/clean-ast.js").massageAST;
 
 const AST_COMPARE = process.env["AST_COMPARE"];
 const VERIFY_ALL_PARSERS = process.env["VERIFY_ALL_PARSERS"] || false;
@@ -48,7 +48,10 @@ function run_spec(dirname, options, additionalParsers) {
         let ppastMassaged;
         let pperr = null;
         try {
-          const ppast = parse(prettyprint(source, path, mergedOptions), mergedOptions)
+          const ppast = parse(
+            prettyprint(source, path, mergedOptions),
+            mergedOptions
+          );
           ppastMassaged = massageAST(ppast);
         } catch (e) {
           pperr = e.stack;
@@ -75,7 +78,10 @@ function stripLocation(ast) {
     const newObj = {};
     for (var key in ast) {
       if (
-        key === "loc" || key === "range" || key === "raw" || key === "comments"
+        key === "loc" ||
+        key === "range" ||
+        key === "raw" ||
+        key === "comments"
       ) {
         continue;
       }