diff --git a/std/testing/runner.ts b/std/testing/runner.ts
index 17d5942f8915ef..d2204477531c2b 100755
--- a/std/testing/runner.ts
+++ b/std/testing/runner.ts
@@ -116,28 +116,6 @@ export interface RunTestModulesOptions extends RunTestsOptions {
   allowNone?: boolean;
 }
 
-/**
- * Renders test file that will be run.
- *
- * It's done to optimize compilation of test files, because
- * dynamically importing them one by one takes very long time.
- * @TODO(bartlomieju): try to optimize compilation by reusing same compiler host
- * multiple times
- * @param testModules
- */
-function renderTestFile(testModules: string[]): string {
-  let testFile = "";
-
-  for (const testModule of testModules) {
-    // NOTE: this is intentional that template string is not used
-    // because of TS compiler quirkness of trying to import it
-    // rather than treating it like a variable
-    testFile += 'import "' + testModule + '"\n';
-  }
-
-  return testFile;
-}
-
 /**
  * Import the specified test modules and run their tests as a suite.
  *
@@ -175,9 +153,8 @@ export async function runTestModules({
   disableLog = false
 }: RunTestModulesOptions = {}): Promise<void> {
   let moduleCount = 0;
-  const testModules = [];
   for await (const testModule of findTestModules(include, exclude)) {
-    testModules.push(testModule);
+    await import(testModule);
     moduleCount++;
   }
 
@@ -191,44 +168,6 @@ export async function runTestModules({
     return;
   }
 
-  // Create temporary test file which contains
-  // all matched modules as import statements.
-  const testFile = renderTestFile(testModules);
-  // Select where temporary test file will be stored.
-  // If `DENO_DIR` is set it means that user intentionally wants to store
-  // modules there - so it's a sane default to store there.
-  // Fallback is current directory which again seems like a sane default,
-  // user is probably working on project in this directory or even
-  // cd'ed into current directory to quickly run test from this directory.
-  const root = Deno.env("DENO_DIR") || Deno.cwd();
-  const testFilePath = join(root, ".deno.test.ts");
-  const data = new TextEncoder().encode(testFile);
-  await Deno.writeFile(testFilePath, data);
-
-  // Import temporary test file and delete it immediately after importing so it's not cluttering disk.
-  //
-  // You may think that this will cause recompilation on each run, but this actually
-  // tricks Deno to not recompile files if there's no need.
-  // Eg.
-  //   1. On first run of $DENO_DIR/.deno.test.ts Deno will compile and cache temporary test file and all of its imports
-  //   2. Temporary test file is removed by test runner
-  //   3. On next test run file is created again. If no new modules were added then temporary file contents are identical.
-  //      Deno will not compile temporary test file again, but load it directly into V8.
-  //   4. Deno starts loading imports one by one.
-  //   5. If imported file is outdated, Deno will recompile this single file.
-  let err;
-  try {
-    await import(`file://${testFilePath}`);
-  } catch (e) {
-    err = e;
-  } finally {
-    await Deno.remove(testFilePath);
-  }
-
-  if (err) {
-    throw err;
-  }
-
   if (!disableLog) {
     console.log(`Found ${moduleCount} matching test modules.`);
   }