diff --git a/tools/src/helpers.ts b/tools/src/helpers.ts
index 790407497..bb95fd253 100644
--- a/tools/src/helpers.ts
+++ b/tools/src/helpers.ts
@@ -93,8 +93,12 @@ export function write_yaml (file_path: string, content: any): void {
     }))
 }
 
+export function to_json(content: any, replacer?: (this: any, key: string, value: any) => any): string {
+  return JSON.stringify(content, replacer, 2)
+}
+
 export function write_json (file_path: string, content: any, replacer?: (this: any, key: string, value: any) => any): void {
-  write_text(file_path, JSON.stringify(content, replacer, 2))
+  write_text(file_path, to_json(content, replacer))
 }
 
 export async function sleep (ms: number): Promise<void> {
diff --git a/tools/src/linter/components/base/FileValidator.ts b/tools/src/linter/components/base/FileValidator.ts
index 53a887014..a6f9da82e 100644
--- a/tools/src/linter/components/base/FileValidator.ts
+++ b/tools/src/linter/components/base/FileValidator.ts
@@ -10,7 +10,7 @@
 import ValidatorBase from './ValidatorBase'
 import { type ValidationError } from 'types'
 import { type OpenAPIV3 } from 'openapi-types'
-import { read_yaml } from '../../../helpers'
+import { read_yaml, to_json } from '../../../helpers'
 import AJV from 'ajv'
 import addFormats from 'ajv-formats'
 
@@ -65,7 +65,7 @@ export default class FileValidator extends ValidatorBase {
     addFormats(ajv)
     const validator = ajv.compile(schema)
     if (!validator(this.spec())) {
-      return this.error(`File content does not match JSON schema found in '${json_schema_path}':\n ${JSON.stringify(validator.errors, null, 2)}`)
+      return this.error(`File content does not match JSON schema found in '${json_schema_path}':\n ${to_json(validator.errors)}`)
     }
   }
 }
diff --git a/tools/src/tester/ChapterReader.ts b/tools/src/tester/ChapterReader.ts
index 827d2e181..04ff18b1d 100644
--- a/tools/src/tester/ChapterReader.ts
+++ b/tools/src/tester/ChapterReader.ts
@@ -11,6 +11,7 @@ import { type ChapterRequest, type ActualResponse, type Parameter } from './type
 import { type OpenSearchHttpClient } from '../OpenSearchHttpClient'
 import { type StoryOutputs } from './StoryOutputs'
 import { Logger } from 'Logger'
+import { to_json } from '../helpers'
 
 // A lightweight client for testing the API
 export default class ChapterReader {
@@ -27,14 +28,14 @@ export default class ChapterReader {
     const resolved_params = story_outputs.resolve_params(chapter.parameters ?? {})
     const [url_path, params] = this.#parse_url(chapter.path, resolved_params)
     const request_data = chapter.request_body?.payload !== undefined ? story_outputs.resolve_value(chapter.request_body.payload) : undefined
-    this.logger.info(`=> ${chapter.method} ${url_path} (${JSON.stringify(params, null, 2)}) | ${JSON.stringify(request_data, null, 2)}`)
+    this.logger.info(`=> ${chapter.method} ${url_path} (${to_json(params)}) | ${to_json(request_data)}`)
     await this._client.request({
       url: url_path,
       method: chapter.method,
       params,
       data: request_data
     }).then(r => {
-      this.logger.info(`<= ${r.status} (${r.headers['content-type']}) | ${JSON.stringify(r.data, null, 2)}`)
+      this.logger.info(`<= ${r.status} (${r.headers['content-type']}) | ${to_json(r.data)}`)
       response.status = r.status
       response.content_type = r.headers['content-type'].split(';')[0]
       response.payload = r.data
@@ -43,7 +44,7 @@ export default class ChapterReader {
         this.logger.info(`<= ERROR: ${e}`)
         throw e
       }
-      this.logger.info(`<= ${e.response.status} (${e.response.headers['content-type']}) | ${JSON.stringify(e.response.data, null, 2)}`)
+      this.logger.info(`<= ${e.response.status} (${e.response.headers['content-type']}) | ${to_json(e.response.data)}`)
       response.status = e.response.status
       response.content_type = e.response.headers['content-type'].split(';')[0]
       response.payload = e.response.data?.error
diff --git a/tools/src/tester/MergedOpenApiSpec.ts b/tools/src/tester/MergedOpenApiSpec.ts
index 903526dc1..8ff253157 100644
--- a/tools/src/tester/MergedOpenApiSpec.ts
+++ b/tools/src/tester/MergedOpenApiSpec.ts
@@ -21,12 +21,12 @@ export default class MergedOpenApiSpec {
 
   constructor (spec_path: string, logger: Logger = new Logger()) {
     this.logger = logger
-    this.file_path = spec_path 
+    this.file_path = spec_path
   }
 
   spec (): OpenAPIV3.Document {
     if (this._spec) return this._spec
-    const spec = (new OpenApiMerger(this.file_path, this.logger)).merge()    
+    const spec = (new OpenApiMerger(this.file_path, this.logger)).merge()
     const ctx = new SpecificationContext(this.file_path)
     this.inject_additional_properties(ctx, spec)
     this._spec = spec
@@ -43,7 +43,7 @@ export default class MergedOpenApiSpec {
         }
       }
     })
-    
+
     visitor.visit_specification(ctx, spec)
   }
 }
diff --git a/tools/src/tester/SchemaValidator.ts b/tools/src/tester/SchemaValidator.ts
index 380d891b2..7d13320f9 100644
--- a/tools/src/tester/SchemaValidator.ts
+++ b/tools/src/tester/SchemaValidator.ts
@@ -13,6 +13,7 @@ import addFormats from 'ajv-formats'
 import { type OpenAPIV3 } from 'openapi-types'
 import { type Evaluation, Result } from './types/eval.types'
 import { Logger } from 'Logger'
+import { to_json } from '../helpers'
 
 export default class SchemaValidator {
   private readonly ajv: AJV
@@ -32,8 +33,8 @@ export default class SchemaValidator {
     const validate = this.ajv.compile(schema)
     const valid = validate(data)
     if (! valid) {
-      this.logger.info(`# ${JSON.stringify(schema, null, 2)}`)
-      this.logger.info(`* ${JSON.stringify(data, null, 2)}`)
+      this.logger.info(`# ${to_json(schema)}`)
+      this.logger.info(`* ${to_json(data)}`)
     }
     return {
       result: valid ? Result.PASSED : Result.FAILED,