look for test folder name for solo mode as well

test/hydration/index.js

@@ -41,12 +41,13 @@ describe('hydration', () => {
 		if (dir[0] === '.') return;
 
 		const config = loadConfig(`./hydration/samples/${dir}/_config.js`);
+		const solo = config.solo || /\.solo/.test(dir);
 
-		if (config.solo && process.env.CI) {
+		if (solo && process.env.CI) {
 			throw new Error('Forgot to remove `solo: true` from test');
 		}
 
-		(config.skip ? it.skip : config.solo ? it.only : it)(dir, () => {
+		(config.skip ? it.skip : solo ? it.only : it)(dir, () => {
 			const cwd = path.resolve(`${__dirname}/samples/${dir}`);
 
 			compileOptions = config.compileOptions || {};

test/preprocess/index.js

@@ -7,12 +7,13 @@ describe('preprocess', () => {
 		if (dir[0] === '.') return;
 
 		const config = loadConfig(`${__dirname}/samples/${dir}/_config.js`);
+		const solo = config.solo || /\.solo/.test(dir);
 
-		if (config.solo && process.env.CI) {
+		if (solo && process.env.CI) {
 			throw new Error('Forgot to remove `solo: true` from test');
 		}
 
-		(config.skip ? it.skip : config.solo ? it.only : it)(dir, async () => {
+		(config.skip ? it.skip : solo ? it.only : it)(dir, async () => {
 			const input = fs.readFileSync(`${__dirname}/samples/${dir}/input.svelte`, 'utf-8');
 			const expected = fs.readFileSync(`${__dirname}/samples/${dir}/output.svelte`, 'utf-8');
 

test/runtime/index.js

@@ -50,14 +50,15 @@ describe("runtime", () => {
 		if (dir[0] === ".") return;
 
 		const config = loadConfig(`${__dirname}/samples/${dir}/_config.js`);
+		const solo = config.solo || /\.solo/.test(dir);
 
 		if (hydrate && config.skip_if_hydrate) return;
 
-		if (config.solo && process.env.CI) {
+		if (solo && process.env.CI) {
 			throw new Error("Forgot to remove `solo: true` from test");
 		}
 
-		(config.skip ? it.skip : config.solo ? it.only : it)(`${dir} ${hydrate ? '(with hydration)' : ''}`, () => {
+		(config.skip ? it.skip : solo ? it.only : it)(`${dir} ${hydrate ? '(with hydration)' : ''}`, () => {
 			if (failed.has(dir)) {
 				// this makes debugging easier, by only printing compiled output once
 				throw new Error('skipping test, already failed');

test/server-side-rendering/index.js

@@ -86,14 +86,15 @@ describe("ssr", () => {
 		if (dir[0] === ".") return;
 
 		const config = loadConfig(`./runtime/samples/${dir}/_config.js`);
+		const solo = config.solo || /\.solo/.test(dir);
 
-		if (config.solo && process.env.CI) {
+		if (solo && process.env.CI) {
 			throw new Error("Forgot to remove `solo: true` from test");
 		}
 
 		if (config.skip_if_ssr) return;
 
-		(config.skip ? it.skip : config.solo ? it.only : it)(dir, () => {
+		(config.skip ? it.skip : solo ? it.only : it)(dir, () => {
 			const cwd = path.resolve("test/runtime/samples", dir);
 
 			Object.keys(require.cache)