diff --git a/slo-workload/DEV.md b/slo-workload/DEV.md
new file mode 100644
index 00000000..69617bb3
--- /dev/null
+++ b/slo-workload/DEV.md
@@ -0,0 +1,52 @@
+# SLO development guide
+
+## Local testing
+
+### Start local environment
+
+In the [slo-tests](https://github.com/ydb-platform/slo-tests) project
+in the _playground_ folder
+
+  `docker compose up -d`
+
+### Check everything in the browser
+
+In the browser, open
+
+* [Grafana](http://localhost:3000/)
+
+* [YDB](http://localhost:8765/) (Check SLO dashboard)
+
+### Configure local console to run SLO tests
+
+In the [ydb-nodejs-sdk](https://github.com/ydb-platform/ydb-nodejs-sdk) project
+in the _slo-workload_ folder
+
+  `npm i`
+
+  `set YDB_ANONYMOUS_CREDENTIALS=1`
+
+  `set YDB_SSL_ROOT_CERTIFICATES_FILE=../../slo-tests/playground/data/ydb_certs/ca.pem`
+
+### Create the test database
+
+  `npx ts-node src/index.ts create grpcs://localhost:2135 local`
+
+### Run the test - for 5 min
+
+  `npx ts-node src/index.ts run grpcs://localhost:2135 local`
+
+### Clean the baseClean the base
+
+  `npx ts-node src/index.ts cleanup grpcs://localhost:2135 local`
+
+### What to do in case of problems
+
+* Restart the environment
+
+  `docker compose down`
+
+  `docker compose up -d`
+
+* Repeat the tests several times. There are floating errors because the tests
+  are integration tests. So the picture may vary from one run to another
diff --git a/slo-workload/src/metricsJob.ts b/slo-workload/src/metricsJob.ts
index 9ed10a57..f956ac82 100644
--- a/slo-workload/src/metricsJob.ts
+++ b/slo-workload/src/metricsJob.ts
@@ -1,7 +1,7 @@
 import Executor from './utils/Executor'
 
 export class MetricsJob {
-  private intervalId: NodeJS.Timer | undefined
+  private intervalId: NodeJS.Timeout | undefined
   private endTime: number
   private promise: Promise<void>
 
diff --git a/slo-workload/src/utils/RateLimiter.ts b/slo-workload/src/utils/RateLimiter.ts
index c00a897f..c5a9cdb0 100644
--- a/slo-workload/src/utils/RateLimiter.ts
+++ b/slo-workload/src/utils/RateLimiter.ts
@@ -3,7 +3,7 @@ import NanoTimer from 'nanotimer'
 export default class RateLimiter {
   private delayMicroSec: number
   private count: number = 0
-  private realRPSObserverId: NodeJS.Timer
+  private realRPSObserverId: NodeJS.Timeout
   private returnerTimer: NanoTimer
   private real: number = 0
   private returner = () => {}