diff --git a/changelog.md b/changelog.md
index 7aa093b..c5a24b8 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 2025-11-17 - 2.8.2 - fix(logging)
+Include runtime identifier in per-test logfile name and sanitize runtime string
+
+- Append a sanitized runtime identifier to the per-test log filename (format: <safeFilename>__<safeRuntime>.log) so runs for different runtimes don't clash
+- Sanitize runtime names by lowercasing and removing non-alphanumeric characters to produce filesystem-safe filenames
+
 ## 2025-11-17 - 2.8.1 - fix(config)
 Remove Bun config file and set deno.json useDefineForClassFields to false for compatibility
 
diff --git a/ts/00_commitinfo_data.ts b/ts/00_commitinfo_data.ts
index 024851c..00e48c1 100644
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@git.zone/tstest',
-  version: '2.8.1',
+  version: '2.8.2',
   description: 'a test utility to run tests that match test/**/*.ts'
 }
diff --git a/ts/tstest.logging.ts b/ts/tstest.logging.ts
index 350aa80..71a5348 100644
--- a/ts/tstest.logging.ts
+++ b/ts/tstest.logging.ts
@@ -200,15 +200,18 @@ export class TsTestLogger {
         .replace(/\//g, '__') // Replace path separators with double underscores
         .replace(/\.ts$/, '') // Remove .ts extension
         .replace(/^\.\.__|^\.__|^__/, ''); // Clean up leading separators from relative paths
-      
-      this.currentTestLogFile = path.join('.nogit', 'testlogs', `${safeFilename}.log`);
-      
+
+      // Sanitize runtime name for use in filename (lowercase, no spaces/dots/special chars)
+      const safeRuntime = runtime.toLowerCase().replace(/[^a-z0-9]/g, '');
+
+      this.currentTestLogFile = path.join('.nogit', 'testlogs', `${safeFilename}__${safeRuntime}.log`);
+
       // Ensure the directory exists
       const logDir = path.dirname(this.currentTestLogFile);
       if (!fs.existsSync(logDir)) {
         fs.mkdirSync(logDir, { recursive: true });
       }
-      
+
       // Clear the log file for this test
       fs.writeFileSync(this.currentTestLogFile, '');
     }