diff --git a/generators/generate-blueprint/__snapshots__/generator.spec.ts.snap b/generators/generate-blueprint/__snapshots__/generator.spec.ts.snap
index 7a5521ffb139..2ec4f41544c5 100644
--- a/generators/generate-blueprint/__snapshots__/generator.spec.ts.snap
+++ b/generators/generate-blueprint/__snapshots__/generator.spec.ts.snap
@@ -863,6 +863,9 @@ exports[`generator - generate-blueprint with all option should match snapshot 1`
   "vitest.config.ts": {
     "stateCleared": "modified",
   },
+  "vitest.test-setup.ts": {
+    "stateCleared": "modified",
+  },
 }
 `;
 
@@ -907,5 +910,8 @@ exports[`generator - generate-blueprint with default config should write files a
   "vitest.config.ts": {
     "stateCleared": "modified",
   },
+  "vitest.test-setup.ts": {
+    "stateCleared": "modified",
+  },
 }
 `;
diff --git a/generators/generate-blueprint/files.ts b/generators/generate-blueprint/files.ts
index 49a75734e3b0..91f401dec16a 100644
--- a/generators/generate-blueprint/files.ts
+++ b/generators/generate-blueprint/files.ts
@@ -30,6 +30,7 @@ export const files = asWriteFilesSection<any>({
         'README.md',
         'tsconfig.json',
         'vitest.config.ts',
+        'vitest.test-setup.ts',
         '.blueprint/cli/commands.mjs',
         '.blueprint/generate-sample/command.mjs',
         '.blueprint/generate-sample/generator.mjs',
diff --git a/generators/generate-blueprint/templates/generators/generator/generator.spec.mjs.ejs b/generators/generate-blueprint/templates/generators/generator/generator.spec.mjs.ejs
index 9fd887094e3d..d49fcad21c07 100644
--- a/generators/generate-blueprint/templates/generators/generator/generator.spec.mjs.ejs
+++ b/generators/generate-blueprint/templates/generators/generator/generator.spec.mjs.ejs
@@ -31,19 +31,18 @@ describe('SubGenerator <%= subGenerator %> of <%= application.baseName %> JHipst
   describe('run', () => {
     beforeAll(async function() {
       await helpers
+<%_ if (subGenerator === 'jdl') { _%>
+        .runJDL('application { }')
+<%_ } else { _%>
         .run(<%= customGenerator ? 'SUB_GENERATOR_NAMESPACE' : 'BLUEPRINT_NAMESPACE' %>)
+<%_ } _%>
         .withJHipsterConfig()
         .withOptions({
           ignoreNeedlesError: true,
-<%_ if (!customGenerator) { _%>
-          blueprint: ['<%= application.baseName %>'],
-<%_ } _%>
-<%_ if (subGenerator === 'jdl') { _%>
-          inline: 'application { }',
-<%_ } _%>
         })
         .withJHipsterGenerators()
-        .withParentBlueprintLookup();
+        .withConfiguredBlueprint()
+        .withBlueprintConfig();
     });
 
     it('should succeed', () => {
diff --git a/generators/generate-blueprint/templates/vitest.config.ts.ejs b/generators/generate-blueprint/templates/vitest.config.ts.ejs
index d46556a90a3b..d1fa83cf8397 100644
--- a/generators/generate-blueprint/templates/vitest.config.ts.ejs
+++ b/generators/generate-blueprint/templates/vitest.config.ts.ejs
@@ -5,5 +5,6 @@ export default defineConfig({
     pool: 'forks',
     hookTimeout: 20000,
     exclude: [...defaultExclude.filter(val => val !== '**/cypress/**'), '**/templates/**', '**/resources/**'],
+    setupFiles: ['./vitest.test-setup.ts'],
   },
 });
diff --git a/generators/generate-blueprint/templates/vitest.test-setup.ts.ejs b/generators/generate-blueprint/templates/vitest.test-setup.ts.ejs
new file mode 100644
index 000000000000..0240b97c5722
--- /dev/null
+++ b/generators/generate-blueprint/templates/vitest.test-setup.ts.ejs
@@ -0,0 +1,7 @@
+import { fileURLToPath } from 'node:url';
+import { defineDefaults } from 'generator-jhipster/testing';
+
+defineDefaults({
+  blueprint: 'generator-jhipster-<%= baseName %>',
+  blueprintPackagePath: fileURLToPath(new URL('./', import.meta.url)),
+});
diff --git a/lib/testing/helpers.ts b/lib/testing/helpers.ts
index 8c6a00934427..956f6b3bdc86 100644
--- a/lib/testing/helpers.ts
+++ b/lib/testing/helpers.ts
@@ -1,4 +1,5 @@
-import { basename, dirname, isAbsolute, join } from 'path';
+import assert from 'node:assert';
+import { basename, dirname, isAbsolute, join } from 'node:path';
 import { mock } from 'node:test';
 import { merge, set, snakeCase } from 'lodash-es';
 import type { RunContextSettings, RunResult } from 'yeoman-test';
@@ -65,6 +66,14 @@ type JHipsterRunResult<GeneratorType extends CoreGenerator = CoreGenerator> = Om
   createJHipster: (ns: string, options?: WithJHipsterGenerators) => JHipsterRunContext;
 };
 
+type HelpersDefaults = {
+  /** Blueprint namespace */
+  blueprint?: string;
+  /** Path where blueprint's generators folder is located */
+  blueprintPackagePath?: string;
+  entrypointGenerator?: string;
+};
+
 const runResult = result as JHipsterRunResult;
 
 export { runResult, runResult as result };
@@ -90,6 +99,11 @@ const defaultSharedApplication = Object.fromEntries(['CLIENT_WEBPACK_DIR'].map(k
 
 let defaultMockFactory: (original?: any) => any;
 let defaultAccumulateMockArgs: (mocks: Record<string, any>) => Record<string, any>;
+let helpersDefaults: HelpersDefaults = {};
+
+export const resetDefaults = () => {
+  helpersDefaults = {};
+};
 
 const createEnvBuilderEnvironment = (...args) => EnvironmentBuilder.createEnv(...args);
 
@@ -99,9 +113,11 @@ export const defineDefaults = async (
     mockFactory?: any;
     /** @deprecated mock from `node:test` is used internally */
     accumulateMockArgs?: (mock: Record<string, any>) => Record<string, any>;
-  } = {},
+  } & HelpersDefaults = {},
 ) => {
-  const { mockFactory, accumulateMockArgs } = defaults;
+  const { mockFactory, accumulateMockArgs, ...rest } = defaults;
+  Object.assign(helpersDefaults, rest);
+
   if (mockFactory) {
     defaultMockFactory = mockFactory;
   } else if (!defaultMockFactory) {
@@ -253,6 +269,36 @@ class JHipsterRunContext extends RunContext<GeneratorTestType> {
     return this.withJHipsterGenerators();
   }
 
+  withBlueprintConfig(config: Record<string, any>): this {
+    const { blueprint } = helpersDefaults;
+    assert(blueprint, 'Blueprint must be configured');
+    return this.withYoRcConfig(blueprint, config);
+  }
+
+  /**
+   * Use configured default blueprint.
+   */
+  withConfiguredBlueprint(): this {
+    const { blueprint, blueprintPackagePath, entrypointGenerator } = helpersDefaults;
+    assert(blueprintPackagePath, 'Blueprint generators package path must be configured');
+    assert(blueprint, 'Blueprint must be configured');
+
+    if (entrypointGenerator) {
+      this.withOptions({ entrypointGenerator });
+    }
+
+    return this.withLookups([
+      {
+        packagePaths: [blueprintPackagePath],
+        // @ts-expect-error lookups is not exported
+        lookups: [`generators`, `generators/*/generators`],
+        customizeNamespace: ns => ns?.replaceAll(':generators:', ':'),
+      },
+    ]).withOptions({
+      blueprint: [blueprint],
+    });
+  }
+
   /**
    * Lookup generators at generator-jhipster's parent at a npm repository
    * @param lookups generators relative folder
diff --git a/test/__snapshots__/api.spec.js.snap b/test/__snapshots__/api.spec.js.snap
index d58796a40c63..600ec1669a4a 100644
--- a/test/__snapshots__/api.spec.js.snap
+++ b/test/__snapshots__/api.spec.js.snap
@@ -104,6 +104,7 @@ exports[`public api generator-jhipster/generators should match snapshot 2`] = `
   "matchWrittenFiles",
   "parseIssue",
   "prepareSample",
+  "resetDefaults",
   "result",
   "runResult",
   "setGithubTaskOutput",