diff --git a/.prettierignore b/.prettierignore
index f306015e3..7a309d2a7 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -1,7 +1,7 @@
 dist/
 .cache/
 coverage/
-/tests/
+/tests/**/*.*
 !/tests/**/jsfmt.spec.js
 /tests_integration/cli/
 /tests_integration/plugins/
diff --git a/tests/arrow-call/jsfmt.spec.js b/tests/arrow-call/jsfmt.spec.js
index 3f8b48a0b..3f436996f 100644
--- a/tests/arrow-call/jsfmt.spec.js
+++ b/tests/arrow-call/jsfmt.spec.js
@@ -1,7 +1,7 @@
 run_spec(__dirname, ["babel", "flow", "typescript"]);
 run_spec(__dirname, ["babel", "flow", "typescript"], {
-  trailingComma: "all"
+  trailingComma: "all",
 });
 run_spec(__dirname, ["babel", "flow", "typescript"], {
-  arrowParens: "always"
+  arrowParens: "always",
 });
diff --git a/tests/comments_jsx_same_line/jsfmt.spec.js b/tests/comments_jsx_same_line/jsfmt.spec.js
index 478e472a6..7cec70314 100644
--- a/tests/comments_jsx_same_line/jsfmt.spec.js
+++ b/tests/comments_jsx_same_line/jsfmt.spec.js
@@ -1,3 +1,3 @@
 run_spec(__dirname, ["flow", "babel", "typescript"], {
-  jsxBracketSameLine: true
+  jsxBracketSameLine: true,
 });
diff --git a/tests/cursor/jsfmt.spec.js b/tests/cursor/jsfmt.spec.js
index b16ec2b2f..49553ffb2 100644
--- a/tests/cursor/jsfmt.spec.js
+++ b/tests/cursor/jsfmt.spec.js
@@ -7,7 +7,7 @@ test("translates cursor correctly in basic case", () => {
     prettier.formatWithCursor(" 1", { parser: "babel", cursorOffset: 2 })
   ).toEqual({
     formatted: "1;\n",
-    cursorOffset: 1
+    cursorOffset: 1,
   });
 });
 
@@ -17,7 +17,7 @@ test("positions cursor relative to closest node, not SourceElement", () => {
     prettier.formatWithCursor(code, { parser: "babel", cursorOffset: 15 })
   ).toEqual({
     formatted: "return 15;\n",
-    cursorOffset: 7
+    cursorOffset: 7,
   });
 });
 
@@ -27,7 +27,7 @@ test("keeps cursor inside formatted node", () => {
     prettier.formatWithCursor(code, { parser: "babel", cursorOffset: 14 })
   ).toEqual({
     formatted: "return 15;\n",
-    cursorOffset: 7
+    cursorOffset: 7,
   });
 });
 
@@ -43,6 +43,6 @@ foo('bar', cb => {
   console.log("stuff");
 });
 `,
-    cursorOffset: 25
+    cursorOffset: 25,
   });
 });
diff --git a/tests/empty/jsfmt.spec.js b/tests/empty/jsfmt.spec.js
index 1277371c5..58c7c013f 100644
--- a/tests/empty/jsfmt.spec.js
+++ b/tests/empty/jsfmt.spec.js
@@ -1,11 +1,11 @@
 const prettier = require("prettier/local");
 const parsers = prettier
   .getSupportInfo()
-  .options.find(option => option.name === "parser");
+  .options.find((option) => option.name === "parser");
 
 run_spec(
   __dirname,
   parsers.choices
-    .filter(choice => !choice.deprecated)
-    .map(choice => choice.value)
+    .filter((choice) => !choice.deprecated)
+    .map((choice) => choice.value)
 );
diff --git a/tests/jsx/jsfmt.spec.js b/tests/jsx/jsfmt.spec.js
index 1f6f2c02b..f864fc536 100644
--- a/tests/jsx/jsfmt.spec.js
+++ b/tests/jsx/jsfmt.spec.js
@@ -1,16 +1,16 @@
 run_spec(__dirname, ["flow", "babel", "typescript"], {
   singleQuote: false,
-  jsxSingleQuote: false
+  jsxSingleQuote: false,
 });
 run_spec(__dirname, ["flow", "babel", "typescript"], {
   singleQuote: false,
-  jsxSingleQuote: true
+  jsxSingleQuote: true,
 });
 run_spec(__dirname, ["flow", "babel", "typescript"], {
   singleQuote: true,
-  jsxSingleQuote: false
+  jsxSingleQuote: false,
 });
 run_spec(__dirname, ["flow", "babel", "typescript"], {
   singleQuote: true,
-  jsxSingleQuote: true
+  jsxSingleQuote: true,
 });
diff --git a/tests/multiparser_js_html/jsfmt.spec.js b/tests/multiparser_js_html/jsfmt.spec.js
index ebb684d41..afb41c93b 100644
--- a/tests/multiparser_js_html/jsfmt.spec.js
+++ b/tests/multiparser_js_html/jsfmt.spec.js
@@ -1,4 +1,4 @@
 run_spec(__dirname, ["babel", "flow", "typescript"]);
 run_spec(__dirname, ["babel", "flow", "typescript"], {
-  htmlWhitespaceSensitivity: "ignore"
+  htmlWhitespaceSensitivity: "ignore",
 });
diff --git a/tests/quote_props/jsfmt.spec.js b/tests/quote_props/jsfmt.spec.js
index 0c8f1ad3e..7652348d9 100644
--- a/tests/quote_props/jsfmt.spec.js
+++ b/tests/quote_props/jsfmt.spec.js
@@ -1,15 +1,15 @@
 run_spec(__dirname, ["flow", "babel"], {
-  quoteProps: "as-needed"
+  quoteProps: "as-needed",
 });
 
 run_spec(__dirname, ["flow", "babel"], {
-  quoteProps: "preserve"
+  quoteProps: "preserve",
 });
 
 run_spec(__dirname, ["flow", "babel"], {
-  quoteProps: "consistent"
+  quoteProps: "consistent",
 });
 run_spec(__dirname, ["flow", "babel"], {
   quoteProps: "consistent",
-  singleQuote: true
+  singleQuote: true,
 });
diff --git a/tests/quote_props_typescript/jsfmt.spec.js b/tests/quote_props_typescript/jsfmt.spec.js
index b2443baa4..c17eda737 100644
--- a/tests/quote_props_typescript/jsfmt.spec.js
+++ b/tests/quote_props_typescript/jsfmt.spec.js
@@ -1,11 +1,11 @@
 run_spec(__dirname, ["typescript"], {
-  quoteProps: "as-needed"
+  quoteProps: "as-needed",
 });
 
 run_spec(__dirname, ["typescript"], {
-  quoteProps: "preserve"
+  quoteProps: "preserve",
 });
 
 run_spec(__dirname, ["typescript"], {
-  quoteProps: "consistent"
+  quoteProps: "consistent",
 });
diff --git a/tests/typescript/compiler/jsfmt.spec.js b/tests/typescript/compiler/jsfmt.spec.js
index e018c7184..2eeafba64 100644
--- a/tests/typescript/compiler/jsfmt.spec.js
+++ b/tests/typescript/compiler/jsfmt.spec.js
@@ -2,6 +2,6 @@ run_spec(__dirname, ["typescript"], {
   disableBabelTS: [
     "downlevelLetConst1.ts",
     "errorOnInitializerInInterfaceProperty.ts",
-    "modifiersOnInterfaceIndexSignature1.ts"
-  ]
+    "modifiersOnInterfaceIndexSignature1.ts",
+  ],
 });
diff --git a/tests/typescript/conformance/classes/classDeclarations/classAbstractKeyword/jsfmt.spec.js b/tests/typescript/conformance/classes/classDeclarations/classAbstractKeyword/jsfmt.spec.js
index 900677c6a..a78c9d443 100644
--- a/tests/typescript/conformance/classes/classDeclarations/classAbstractKeyword/jsfmt.spec.js
+++ b/tests/typescript/conformance/classes/classDeclarations/classAbstractKeyword/jsfmt.spec.js
@@ -1,3 +1,3 @@
 run_spec(__dirname, ["typescript"], {
-  disableBabelTS: ["classAbstractMixedWithModifiers.ts"]
+  disableBabelTS: ["classAbstractMixedWithModifiers.ts"],
 });
diff --git a/tests/typescript/conformance/classes/constructorDeclarations/constructorParameters/jsfmt.spec.js b/tests/typescript/conformance/classes/constructorDeclarations/constructorParameters/jsfmt.spec.js
index b8a739b47..66a924401 100644
--- a/tests/typescript/conformance/classes/constructorDeclarations/constructorParameters/jsfmt.spec.js
+++ b/tests/typescript/conformance/classes/constructorDeclarations/constructorParameters/jsfmt.spec.js
@@ -1,3 +1,3 @@
 run_spec(__dirname, ["typescript"], {
-  disableBabelTS: ["readonlyInConstructorParameters.ts", "readonlyReadonly.ts"]
+  disableBabelTS: ["readonlyInConstructorParameters.ts", "readonlyReadonly.ts"],
 });
diff --git a/tests/typescript/conformance/types/functions/jsfmt.spec.js b/tests/typescript/conformance/types/functions/jsfmt.spec.js
index c5547c764..18f3c1f02 100644
--- a/tests/typescript/conformance/types/functions/jsfmt.spec.js
+++ b/tests/typescript/conformance/types/functions/jsfmt.spec.js
@@ -1,3 +1,3 @@
 run_spec(__dirname, ["typescript"], {
-  disableBabelTS: ["functionOverloadErrorsSyntax.ts"]
+  disableBabelTS: ["functionOverloadErrorsSyntax.ts"],
 });
diff --git a/tests/typescript/custom/abstract/jsfmt.spec.js b/tests/typescript/custom/abstract/jsfmt.spec.js
index cc68c821f..65d2aad21 100644
--- a/tests/typescript/custom/abstract/jsfmt.spec.js
+++ b/tests/typescript/custom/abstract/jsfmt.spec.js
@@ -1,3 +1,3 @@
 run_spec(__dirname, ["typescript"], {
-  disableBabelTS: ["abstractProperties.ts", "abstractPropertiesWithBreaks.ts"]
+  disableBabelTS: ["abstractProperties.ts", "abstractPropertiesWithBreaks.ts"],
 });
diff --git a/tests/typescript_class/jsfmt.spec.js b/tests/typescript_class/jsfmt.spec.js
index ca20c03e0..c3810386c 100644
--- a/tests/typescript_class/jsfmt.spec.js
+++ b/tests/typescript_class/jsfmt.spec.js
@@ -1,3 +1,3 @@
 run_spec(__dirname, ["typescript"], {
-  disableBabelTS: ["constructor.ts", "generics.ts", "methods.ts"]
+  disableBabelTS: ["constructor.ts", "generics.ts", "methods.ts"],
 });
diff --git a/tests/typescript_error_recovery/jsfmt.spec.js b/tests/typescript_error_recovery/jsfmt.spec.js
index e097bb78e..59512d723 100644
--- a/tests/typescript_error_recovery/jsfmt.spec.js
+++ b/tests/typescript_error_recovery/jsfmt.spec.js
@@ -1,11 +1,11 @@
 run_spec(__dirname, ["typescript"], {
-  disableBabelTS: ["jsdoc_only_types.ts", "index-signature.ts"]
+  disableBabelTS: ["jsdoc_only_types.ts", "index-signature.ts"],
 });
 run_spec(__dirname, ["typescript"], {
   trailingComma: "es5",
-  disableBabelTS: ["jsdoc_only_types.ts", "index-signature.ts"]
+  disableBabelTS: ["jsdoc_only_types.ts", "index-signature.ts"],
 });
 run_spec(__dirname, ["typescript"], {
   trailingComma: "all",
-  disableBabelTS: ["jsdoc_only_types.ts", "index-signature.ts"]
+  disableBabelTS: ["jsdoc_only_types.ts", "index-signature.ts"],
 });
diff --git a/tests/typescript_interface/jsfmt.spec.js b/tests/typescript_interface/jsfmt.spec.js
index 1336a726c..1c149d003 100644
--- a/tests/typescript_interface/jsfmt.spec.js
+++ b/tests/typescript_interface/jsfmt.spec.js
@@ -1,5 +1,5 @@
 run_spec(__dirname, ["typescript"], { disableBabelTS: ["abstract.ts"] });
 run_spec(__dirname, ["typescript"], {
   semi: false,
-  disableBabelTS: ["abstract.ts"]
+  disableBabelTS: ["abstract.ts"],
 });