diff --git a/kotlin/workflow-runtime/src/main/java/com/squareup/workflow/testing/LaunchWorkflow.kt b/kotlin/workflow-runtime/src/main/java/com/squareup/workflow/testing/LaunchWorkflow.kt
index 359e1eb15..a034edae2 100644
--- a/kotlin/workflow-runtime/src/main/java/com/squareup/workflow/testing/LaunchWorkflow.kt
+++ b/kotlin/workflow-runtime/src/main/java/com/squareup/workflow/testing/LaunchWorkflow.kt
@@ -28,6 +28,7 @@ import com.squareup.workflow.testing.WorkflowTestParams.StartMode.StartFromWorkf
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.flow.Flow
 import org.jetbrains.annotations.TestOnly
+import kotlin.coroutines.CoroutineContext
 
 /**
  * Launches the [workflow] in a new coroutine in [scope]. The workflow tree is seeded with
@@ -42,6 +43,7 @@ fun <PropsT, StateT, OutputT : Any, RenderingT, RunnerT> launchWorkflowForTestFr
   workflow: StatefulWorkflow<PropsT, StateT, OutputT, RenderingT>,
   props: Flow<PropsT>,
   testParams: WorkflowTestParams<StateT>,
+  workerContext: CoroutineContext,
   beforeStart: CoroutineScope.(session: WorkflowSession<OutputT, RenderingT>) -> RunnerT
 ): RunnerT {
   val initialState = (testParams.startFrom as? StartFromState)?.state
@@ -63,6 +65,6 @@ fun <PropsT, StateT, OutputT : Any, RenderingT, RunnerT> launchWorkflowForTestFr
       initialState = initialState,
       initialSnapshot = initialSnapshot,
       beforeStart = beforeStart,
-      workerContext = testParams.workerContext
+      workerContext = workerContext
   )
 }
diff --git a/kotlin/workflow-runtime/src/main/java/com/squareup/workflow/testing/WorkflowTestParams.kt b/kotlin/workflow-runtime/src/main/java/com/squareup/workflow/testing/WorkflowTestParams.kt
index c4f5b9b2c..d789287bf 100644
--- a/kotlin/workflow-runtime/src/main/java/com/squareup/workflow/testing/WorkflowTestParams.kt
+++ b/kotlin/workflow-runtime/src/main/java/com/squareup/workflow/testing/WorkflowTestParams.kt
@@ -37,8 +37,9 @@ import kotlin.coroutines.EmptyCoroutineContext
  * It is recommended to leave this on, but if you need to debug a test and don't want to have to
  * deal with the extra passes, you can temporarily set it to false.
  * @param workerContext Used to customize the context in which workers are started for tests.
- * Default is [EmptyCoroutineContext], which means the workers will use the context from their
- * workflow and use the [Unconfined][kotlinx.coroutines.Dispatchers.Unconfined] dispatcher.
+ * Default is [EmptyCoroutineContext], which means the workers will use their workflow's context
+ * plus the base context passed into the test method. Any context element present in [workerContext]
+ * will override all other context elements for workers.
  */
 @TestOnly
 data class WorkflowTestParams<out StateT>(
diff --git a/kotlin/workflow-testing/src/main/java/com/squareup/workflow/testing/WorkflowTester.kt b/kotlin/workflow-testing/src/main/java/com/squareup/workflow/testing/WorkflowTester.kt
index 7afc74711..168704125 100644
--- a/kotlin/workflow-testing/src/main/java/com/squareup/workflow/testing/WorkflowTester.kt
+++ b/kotlin/workflow-testing/src/main/java/com/squareup/workflow/testing/WorkflowTester.kt
@@ -283,7 +283,10 @@ fun <T, PropsT, StateT, OutputT : Any, RenderingT>
       scope = CoroutineScope(Unconfined + context + uncaughtExceptionHandler),
       workflow = this@test,
       props = propsChannel.asFlow(),
-      testParams = testParams
+      testParams = testParams,
+      // Use the base context as the starting point for the worker context since it's often used
+      // to pass in test dispatchers, and that's reasonable behavior.
+      workerContext = context + testParams.workerContext
   ) { session ->
     WorkflowTester(this, propsChannel, session.renderingsAndSnapshots, session.outputs)
         .apply { collectFromWorkflow() }