diff --git a/presentation/src/main/java/com/github/nullptroma/wallenc/presentation/screens/main/screens/tasks/TaskPipelineScreen.kt b/presentation/src/main/java/com/github/nullptroma/wallenc/presentation/screens/main/screens/tasks/TaskPipelineScreen.kt
index 773adae..83b8545 100644
--- a/presentation/src/main/java/com/github/nullptroma/wallenc/presentation/screens/main/screens/tasks/TaskPipelineScreen.kt
+++ b/presentation/src/main/java/com/github/nullptroma/wallenc/presentation/screens/main/screens/tasks/TaskPipelineScreen.kt
@@ -1,7 +1,9 @@
 package com.github.nullptroma.wallenc.presentation.screens.main.screens.tasks
 
+import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
@@ -10,6 +12,7 @@ import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Button
+import androidx.compose.material3.Checkbox
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.LinearProgressIndicator
 import androidx.compose.material3.MaterialTheme
@@ -23,6 +26,7 @@ import androidx.compose.runtime.mutableFloatStateOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
@@ -45,6 +49,7 @@ fun TaskPipelineScreen(
     val runningTaskIds = pipeline.runningTaskIds
     var showTestDialog by remember { mutableStateOf(false) }
     var testDurationSec by remember { mutableFloatStateOf(10f) }
+    var testInfinity by remember { mutableStateOf(false) }
 
     Scaffold(
         modifier = modifier,
@@ -128,12 +133,30 @@ fun TaskPipelineScreen(
                         onValueChange = { testDurationSec = it },
                         valueRange = 0f..60f,
                     )
+                    Row(
+                        verticalAlignment = Alignment.CenterVertically,
+                        modifier = Modifier.fillMaxWidth(),
+                    ) {
+                        Checkbox(
+                            checked = testInfinity,
+                            onCheckedChange = { testInfinity = it },
+                        )
+                        Text(
+                            stringResource(R.string.task_pipeline_test_dialog_infinity),
+                            modifier = Modifier
+                                .clickable { testInfinity = !testInfinity }
+                                .weight(1f),
+                        )
+                    }
                 }
             },
             confirmButton = {
                 Button(
                     onClick = {
-                        viewModel.startTestTask(testDurationSec.toInt())
+                        viewModel.startTestTask(
+                            testDurationSec.toInt(),
+                            testInfinity,
+                        )
                         showTestDialog = false
                     },
                 ) {
diff --git a/presentation/src/main/java/com/github/nullptroma/wallenc/presentation/screens/main/screens/tasks/TaskPipelineViewModel.kt b/presentation/src/main/java/com/github/nullptroma/wallenc/presentation/screens/main/screens/tasks/TaskPipelineViewModel.kt
index 5a59016..a3c5549 100644
--- a/presentation/src/main/java/com/github/nullptroma/wallenc/presentation/screens/main/screens/tasks/TaskPipelineViewModel.kt
+++ b/presentation/src/main/java/com/github/nullptroma/wallenc/presentation/screens/main/screens/tasks/TaskPipelineViewModel.kt
@@ -14,10 +14,13 @@ class TaskPipelineViewModel @Inject constructor(
     val orchestrator: ITaskOrchestrator,
 ) : ViewModel() {
 
-    fun startTestTask(durationSec: Int) {
+    fun startTestTask(durationSec: Int, infinityIndeterminateProgress: Boolean) {
         val safeDurationSec = durationSec.coerceIn(0, 60)
+        val title =
+            if (infinityIndeterminateProgress) "Test task (${safeDurationSec}s, ∞)"
+            else "Test task (${safeDurationSec}s)"
         orchestrator.enqueue(
-            title = "Test task (${safeDurationSec}s)",
+            title = title,
             dispatcher = Dispatchers.Default,
             work = { ctx ->
                 val steps = if (safeDurationSec == 0) 1 else safeDurationSec * 10
@@ -26,7 +29,7 @@ class TaskPipelineViewModel @Inject constructor(
                     val fraction = step.toFloat() / steps.toFloat()
                     val elapsedMs = (fraction * safeDurationSec * 1000).toInt()
                     ctx.reportProgress(
-                        fraction = fraction,
+                        fraction = if (infinityIndeterminateProgress) null else fraction,
                         label = "Elapsed: ${elapsedMs / 1000}s / ${safeDurationSec}s",
                     )
                     if (step < steps) delay(100)
diff --git a/presentation/src/main/res/values/strings.xml b/presentation/src/main/res/values/strings.xml
index c8a3777..185522a 100644
--- a/presentation/src/main/res/values/strings.xml
+++ b/presentation/src/main/res/values/strings.xml
@@ -25,6 +25,7 @@
     <string name="task_pipeline_test_dialog_duration">Duration: %1$d s</string>
     <string name="task_pipeline_test_dialog_start">Start</string>
     <string name="task_pipeline_test_dialog_cancel">Cancel</string>
+    <string name="task_pipeline_test_dialog_infinity">Infinity (indeterminate progress)</string>
     <string name="task_state_queued">Queued</string>
     <string name="task_state_running">Running</string>
     <string name="task_state_completed">Completed</string>