diff --git a/actions/generate.action.ts b/actions/generate.action.ts
index 1e024a071..d9faf2d54 100644
--- a/actions/generate.action.ts
+++ b/actions/generate.action.ts
@@ -16,6 +16,7 @@ import {
   shouldAskForProject,
   shouldGenerateFlat,
   shouldGenerateSpec,
+  getSpecFileSuffix,
 } from '../lib/utils/project-utils';
 import { AbstractAction } from './abstract.action';
 
@@ -36,6 +37,7 @@ const generateFiles = async (inputs: Input[]) => {
     .value as string;
   const spec = inputs.find((option) => option.name === 'spec');
   const flat = inputs.find((option) => option.name === 'flat');
+  const specFileSuffix = inputs.find((option) => option.name === 'specFileSuffix');
 
   const collection: AbstractCollection = CollectionFactory.create(
     collectionOption || configuration.collection || Collection.NESTJS,
@@ -52,6 +54,7 @@ const generateFiles = async (inputs: Input[]) => {
 
   const specValue = spec!.value as boolean;
   const flatValue = !!flat as boolean;
+  const specFileSuffixValue = specFileSuffix!.value as string;
   const specOptions = spec!.options as any;
   let generateSpec = shouldGenerateSpec(
     configuration,
@@ -61,6 +64,7 @@ const generateFiles = async (inputs: Input[]) => {
     specOptions.passedAsInput,
   );
   let generateFlat = shouldGenerateFlat(configuration, appName, flatValue);
+  let generateSpecFileSuffix = getSpecFileSuffix(configuration, appName, specFileSuffixValue)
 
   // If you only add a `lib` we actually don't have monorepo: true BUT we do have "projects"
   // Ensure we don't run for new app/libs schematics
@@ -107,12 +111,14 @@ const generateFiles = async (inputs: Input[]) => {
         answers.appNames,
         flatValue,
       );
+      generateSpecFileSuffix = getSpecFileSuffix(configuration, appName, specFileSuffixValue)
     }
   }
 
   schematicOptions.push(new SchematicOption('sourceRoot', sourceRoot));
   schematicOptions.push(new SchematicOption('spec', generateSpec));
   schematicOptions.push(new SchematicOption('flat', generateFlat));
+  schematicOptions.push(new SchematicOption('specFileSuffix', generateSpecFileSuffix));
   try {
     const schematicInput = inputs.find((input) => input.name === 'schematic');
     if (!schematicInput) {
@@ -127,7 +133,7 @@ const generateFiles = async (inputs: Input[]) => {
 };
 
 const mapSchematicOptions = (inputs: Input[]): SchematicOption[] => {
-  const excludedInputNames = ['schematic', 'spec', 'flat'];
+  const excludedInputNames = ['schematic', 'spec', 'flat', 'specFileSuffix'];
   const options: SchematicOption[] = [];
   inputs.forEach((input) => {
     if (!excludedInputNames.includes(input.name) && input.value !== undefined) {
diff --git a/commands/generate.command.ts b/commands/generate.command.ts
index 732a9e0b5..c66544717 100644
--- a/commands/generate.command.ts
+++ b/commands/generate.command.ts
@@ -36,6 +36,10 @@ export class GenerateCommand extends AbstractCommand {
         },
         true,
       )
+      .option(
+        '--spec-file-suffix [suffix]',
+        'Use a custom suffix for spec files.',
+      )
       .option('--skip-import', 'Skip importing', () => true, false)
       .option('--no-spec', 'Disable spec files generation.', () => {
         return { value: false, passedAsInput: true };
@@ -71,6 +75,10 @@ export class GenerateCommand extends AbstractCommand {
                   : command.spec.passedAsInput,
             },
           });
+          options.push({
+            name: 'specFileSuffix',
+            value: command.specFileSuffix,
+          });
           options.push({
             name: 'collection',
             value: command.collection,
diff --git a/lib/configuration/configuration.ts b/lib/configuration/configuration.ts
index 150eacb1a..94fb170b4 100644
--- a/lib/configuration/configuration.ts
+++ b/lib/configuration/configuration.ts
@@ -33,6 +33,7 @@ interface PluginOptions {
 interface GenerateOptions {
   spec?: boolean | Record<string, boolean>;
   flat?: boolean;
+  specFileSuffix?: string;
 }
 
 export interface ProjectConfiguration {
diff --git a/lib/utils/project-utils.ts b/lib/utils/project-utils.ts
index 60598d12a..c7b50fe0c 100644
--- a/lib/utils/project-utils.ts
+++ b/lib/utils/project-utils.ts
@@ -89,6 +89,31 @@ export function shouldGenerateFlat(
   return flatValue;
 }
 
+export function getSpecFileSuffix(
+    configuration: Required<Configuration>,
+    appName: string,
+    specFileSuffixValue: string,
+): string {
+  // CLI parameters have the highest priority
+  if (specFileSuffixValue) {
+    return specFileSuffixValue;
+  }
+
+  const specFileSuffixConfiguration = getValueOrDefault(
+      configuration,
+      'generateOptions.specFileSuffix',
+      appName || '',
+      undefined,
+      undefined,
+      'spec',
+  );
+  if (typeof specFileSuffixConfiguration === 'string') {
+    return specFileSuffixConfiguration;
+  }
+  return specFileSuffixValue;
+}
+
+
 export async function askForProjectName(
   promptQuestion: string,
   projects: string[],