diff --git a/cspell.json b/cspell.json
index 737b46957..7c12cb021 100644
--- a/cspell.json
+++ b/cspell.json
@@ -322,6 +322,7 @@
         "standalones",
         "Stankiewicz",
         "starturl",
+        "stylefmt",
         "styleguides",
         "stylelint",
         "stylelintrc",
diff --git a/tests/handlebars/venerable/__snapshots__/jsfmt.spec.js.snap b/tests/html/handlebars-venerable/__snapshots__/jsfmt.spec.js.snap
similarity index 100%
rename from tests/handlebars/venerable/__snapshots__/jsfmt.spec.js.snap
rename to tests/html/handlebars-venerable/__snapshots__/jsfmt.spec.js.snap
diff --git a/tests/handlebars/venerable/jsfmt.spec.js b/tests/html/handlebars-venerable/jsfmt.spec.js
similarity index 100%
rename from tests/handlebars/venerable/jsfmt.spec.js
rename to tests/html/handlebars-venerable/jsfmt.spec.js
diff --git a/tests/handlebars/venerable/template.html b/tests/html/handlebars-venerable/template.html
similarity index 100%
rename from tests/handlebars/venerable/template.html
rename to tests/html/handlebars-venerable/template.html
diff --git a/tests/html/lwc/__snapshots__/jsfmt.spec.js.snap b/tests/lwc/lwc/__snapshots__/jsfmt.spec.js.snap
similarity index 100%
rename from tests/html/lwc/__snapshots__/jsfmt.spec.js.snap
rename to tests/lwc/lwc/__snapshots__/jsfmt.spec.js.snap
diff --git a/tests/html/lwc/attributes.html b/tests/lwc/lwc/attributes.html
similarity index 100%
rename from tests/html/lwc/attributes.html
rename to tests/lwc/lwc/attributes.html
diff --git a/tests/html/lwc/jsfmt.spec.js b/tests/lwc/lwc/jsfmt.spec.js
similarity index 100%
rename from tests/html/lwc/jsfmt.spec.js
rename to tests/lwc/lwc/jsfmt.spec.js
diff --git a/tests/css/trailing-comma/__snapshots__/jsfmt.spec.js.snap b/tests/scss/trailing-comma/__snapshots__/jsfmt.spec.js.snap
similarity index 100%
rename from tests/css/trailing-comma/__snapshots__/jsfmt.spec.js.snap
rename to tests/scss/trailing-comma/__snapshots__/jsfmt.spec.js.snap
diff --git a/tests/css/trailing-comma/at-rules.css b/tests/scss/trailing-comma/at-rules.css
similarity index 100%
rename from tests/css/trailing-comma/at-rules.css
rename to tests/scss/trailing-comma/at-rules.css
diff --git a/tests/css/trailing-comma/declaration.css b/tests/scss/trailing-comma/declaration.css
similarity index 100%
rename from tests/css/trailing-comma/declaration.css
rename to tests/scss/trailing-comma/declaration.css
diff --git a/tests/css/trailing-comma/jsfmt.spec.js b/tests/scss/trailing-comma/jsfmt.spec.js
similarity index 100%
rename from tests/css/trailing-comma/jsfmt.spec.js
rename to tests/scss/trailing-comma/jsfmt.spec.js
diff --git a/tests/css/trailing-comma/list.css b/tests/scss/trailing-comma/list.css
similarity index 100%
rename from tests/css/trailing-comma/list.css
rename to tests/scss/trailing-comma/list.css
diff --git a/tests/css/trailing-comma/map.css b/tests/scss/trailing-comma/map.css
similarity index 100%
rename from tests/css/trailing-comma/map.css
rename to tests/scss/trailing-comma/map.css
diff --git a/tests/css/trailing-comma/selector_list.css b/tests/scss/trailing-comma/selector_list.css
similarity index 100%
rename from tests/css/trailing-comma/selector_list.css
rename to tests/scss/trailing-comma/selector_list.css
diff --git a/tests/css/trailing-comma/variable.css b/tests/scss/trailing-comma/variable.css
similarity index 100%
rename from tests/css/trailing-comma/variable.css
rename to tests/scss/trailing-comma/variable.css
diff --git a/tests/angular/component-examples/__snapshots__/jsfmt.spec.js.snap b/tests/typescript/angular-component-examples/__snapshots__/jsfmt.spec.js.snap
similarity index 100%
rename from tests/angular/component-examples/__snapshots__/jsfmt.spec.js.snap
rename to tests/typescript/angular-component-examples/__snapshots__/jsfmt.spec.js.snap
diff --git a/tests/angular/component-examples/jsfmt.spec.js b/tests/typescript/angular-component-examples/jsfmt.spec.js
similarity index 100%
rename from tests/angular/component-examples/jsfmt.spec.js
rename to tests/typescript/angular-component-examples/jsfmt.spec.js
diff --git a/tests/angular/component-examples/test.component.ts b/tests/typescript/angular-component-examples/test.component.ts
similarity index 100%
rename from tests/angular/component-examples/test.component.ts
rename to tests/typescript/angular-component-examples/test.component.ts
diff --git a/tests_config/run_spec.js b/tests_config/run_spec.js
index 0daf7e402..a693df248 100644
--- a/tests_config/run_spec.js
+++ b/tests_config/run_spec.js
@@ -4,6 +4,7 @@ const fs = require("fs");
 const path = require("path");
 const raw = require("jest-snapshot-serializer-raw").wrap;
 const { isCI } = require("ci-info");
+const checkParsers = require("./utils/check-parsers");
 
 const { TEST_STANDALONE } = process.env;
 const AST_COMPARE = isCI || process.env.AST_COMPARE;
@@ -54,6 +55,9 @@ global.run_spec = (fixtures, parsers, options) => {
   fixtures = typeof fixtures === "string" ? { dirname: fixtures } : fixtures;
   const { dirname } = fixtures;
 
+  // Make sure tests are in correct location
+  checkParsers(dirname, parsers);
+
   // `IS_PARSER_INFERENCE_TESTS` mean to test `inferParser` on `standalone`
   const IS_PARSER_INFERENCE_TESTS = isTestDirectory(
     dirname,
diff --git a/tests_config/utils/check-parsers.js b/tests_config/utils/check-parsers.js
new file mode 100644
index 000000000..8939d598b
--- /dev/null
+++ b/tests_config/utils/check-parsers.js
@@ -0,0 +1,79 @@
+"use strict";
+
+const path = require("path");
+const { outdent } = require("outdent");
+
+const TESTS_ROOT = path.join(__dirname, "../../tests");
+
+const getCategory = (dirname) =>
+  path.relative(TESTS_ROOT, dirname).split(path.sep).shift();
+
+const categoryParsers = new Map(
+  [
+    ["angular", ["angular", "__ng_interpolation"]],
+    ["css", ["css" /* ,"less", "scss" These may allow, but not using */]],
+    ["flow", ["babel", "flow", "babel-flow"]],
+    ["flow-repo", ["babel", "flow", "babel-flow"]],
+    ["graphql", ["graphql"]],
+    ["handlebars", ["glimmer"]],
+    ["html", ["html"]],
+    ["js", ["babel", "flow", "babel-flow", "typescript", "babel-ts"]],
+    ["json", ["json", "json5", "json-stringify"]],
+    ["jsx", ["babel", "flow", "babel-flow", "typescript", "babel-ts"]],
+    ["less", ["css", "less"]],
+    ["lwc", ["lwc"]],
+    ["markdown", ["markdown"]],
+    ["mdx", ["mdx"]],
+    ["scss", ["css", "scss"]],
+    ["stylefmt-repo", ["css"]],
+    ["typescript", ["typescript", "babel-ts"]],
+    ["vue", ["vue"]],
+    ["yaml", ["yaml"]],
+  ].map(([category, parsers]) => [category, new Set(parsers)])
+);
+
+const getParserCategories = (parser) => {
+  const categories = [];
+  for (const [category, parsers] of categoryParsers) {
+    if (parsers.has(parser)) {
+      categories.push(category);
+    }
+  }
+
+  return categories;
+};
+
+const checkParser = (dirname, parsers) => {
+  const category = getCategory(dirname);
+  const allowedParsers = categoryParsers.get(category);
+
+  if (!allowedParsers) {
+    return;
+  }
+
+  for (const parser of parsers) {
+    if (!allowedParsers.has(parser)) {
+      const suggestCategories = getParserCategories(parser);
+
+      const suggestion =
+        suggestCategories.length === 0
+          ? ""
+          : outdent`
+              Suggest move your tests to:
+              ${suggestCategories
+                .map((category) => `- ${path.join(TESTS_ROOT, category)}`)
+                .join("\n")}
+
+              Or config to allow use this parser in "${__filename}".
+            `;
+
+      throw new Error(
+        `Parser "${parser}" should not used in "${dirname}".${
+          suggestion ? `\n\n${suggestion}` : ""
+        }`
+      );
+    }
+  }
+};
+
+module.exports = checkParser;