diff --git a/async_retry.go b/async_retry.go
index a20f1eb..d85c177 100644
--- a/async_retry.go
+++ b/async_retry.go
@@ -94,9 +94,9 @@ func (a *asyncRetry) call(ctx context.Context, f RetryableFunc, config *Config)
 	return retry.Do(
 		func() error {
 			if config.timeout > 0 {
-				var timeoutCancel context.CancelFunc
-				ctx, timeoutCancel = context.WithTimeout(ctx, config.timeout)
+				timeoutCtx, timeoutCancel := context.WithTimeout(ctx, config.timeout)
 				defer timeoutCancel()
+				return f(timeoutCtx)
 			}
 			return f(ctx)
 		},
diff --git a/async_retry_test.go b/async_retry_test.go
index 70ef6c0..7611f1a 100644
--- a/async_retry_test.go
+++ b/async_retry_test.go
@@ -124,6 +124,13 @@ func Test_asyncRetry_Do(t *testing.T) {
 			name: "Timeout set correctly for each try",
 			args: args{
 				f: func(ctx context.Context) error {
+					select {
+					case <-ctx.Done():
+						// Check ctx passed from async-retry is not closed at the start of f() processing.
+						return fmt.Errorf("context already closed")
+					default:
+					}
+
 					counter++
 					select {
 					case <-ctx.Done():
@@ -140,7 +147,7 @@ func Test_asyncRetry_Do(t *testing.T) {
 				},
 				opts: []Option{
 					Delay(1 * time.Millisecond),
-					Timeout(10 * time.Millisecond),
+					Timeout(1 * time.Second),
 					Attempts(5),
 				},
 			},