diff --git a/docs/topics/coroutine-context-and-dispatchers.md b/docs/topics/coroutine-context-and-dispatchers.md
index 969bd21eb9..57d76796b3 100644
--- a/docs/topics/coroutine-context-and-dispatchers.md
+++ b/docs/topics/coroutine-context-and-dispatchers.md
@@ -227,7 +227,6 @@ import kotlinx.coroutines.*
 fun log(msg: String) = println("[${Thread.currentThread().name}] $msg")
 
 fun main() {
-//sampleStart
     newSingleThreadContext("Ctx1").use { ctx1 ->
         newSingleThreadContext("Ctx2").use { ctx2 ->
             runBlocking(ctx1) {
@@ -239,7 +238,6 @@ fun main() {
             }
         }
     }
-//sampleEnd
 }
 ```