diff --git a/code/builders/builder-webpack5/src/preview/iframe-webpack.config.ts b/code/builders/builder-webpack5/src/preview/iframe-webpack.config.ts
index 10704bc25d93..13b02df7264f 100644
--- a/code/builders/builder-webpack5/src/preview/iframe-webpack.config.ts
+++ b/code/builders/builder-webpack5/src/preview/iframe-webpack.config.ts
@@ -323,7 +323,7 @@ export default async (
             fullySpecified: false,
           },
         },
-        builderOptions.useSWC || options.build?.test?.fastCompilation
+        builderOptions.useSWC
           ? await createSWCLoader(Object.keys(virtualModuleMapping), options)
           : createBabelLoader(babelOptions, typescriptOptions, Object.keys(virtualModuleMapping)),
         {
@@ -362,7 +362,7 @@ export default async (
         ? {
             minimize: true,
             // eslint-disable-next-line no-nested-ternary
-            minimizer: options.build?.test?.fastCompilation
+            minimizer: options.build?.test?.esbuildMinify
               ? [
                   new TerserWebpackPlugin<EsbuildOptions>({
                     parallel: true,
diff --git a/code/lib/core-server/src/presets/common-override-preset.ts b/code/lib/core-server/src/presets/common-override-preset.ts
index bffb3f3f0d26..5696701a88cd 100644
--- a/code/lib/core-server/src/presets/common-override-preset.ts
+++ b/code/lib/core-server/src/presets/common-override-preset.ts
@@ -19,7 +19,7 @@ export const framework: PresetProperty<'framework', StorybookConfig> = async (co
 
 export const stories: PresetProperty<'stories', StorybookConfig> = async (entries, options) => {
   if (options?.build?.test?.disableMDXEntries) {
-    const out = (
+    return (
       await Promise.all(
         normalizeStories(entries, {
           configDir: options.configDir,
@@ -34,9 +34,15 @@ export const stories: PresetProperty<'stories', StorybookConfig> = async (entrie
           });
         })
       )
-    ).reduce((carry, s) => carry.concat(s), []);
-
-    return out.filter((s) => !s.endsWith('.mdx'));
+    ).flatMap((expanded, i) => {
+      const filteredEntries = expanded.filter((s) => !s.endsWith('.mdx'));
+      // only return the filtered entries when there is something to filter
+      // as webpack is faster with unexpanded globs
+      if (filteredEntries.length < expanded.length) {
+        return filteredEntries;
+      }
+      return entries[i];
+    });
   }
   return entries;
 };
@@ -63,7 +69,7 @@ const createTestBuildFeatures = (value: boolean): Required<TestBuildFlags> => ({
   disableDocgen: value,
   disableSourcemaps: value,
   disableTreeShaking: value,
-  fastCompilation: value,
+  esbuildMinify: value,
 });
 
 export const build = async (value: StorybookConfig['build'], options: Options) => {
diff --git a/code/lib/types/src/modules/core-common.ts b/code/lib/types/src/modules/core-common.ts
index 584618e337b3..f5043c362d7c 100644
--- a/code/lib/types/src/modules/core-common.ts
+++ b/code/lib/types/src/modules/core-common.ts
@@ -292,9 +292,9 @@ export interface TestBuildFlags {
    */
   disableTreeShaking?: boolean;
   /**
-   * Compile/Optimize with SWC/ESbuild.
+   * Minify with ESBuild when using webpack.
    */
-  fastCompilation?: boolean;
+  esbuildMinify?: boolean;
 }
 
 export interface TestBuildConfig {