Ensure Runner name is always set.

RELNOTES: None.
PiperOrigin-RevId: 190617155
diff --git a/src/test/java/com/google/devtools/build/lib/actions/SpawnResultTest.java b/src/test/java/com/google/devtools/build/lib/actions/SpawnResultTest.java
index 4fedd29..6dccb47 100644
--- a/src/test/java/com/google/devtools/build/lib/actions/SpawnResultTest.java
+++ b/src/test/java/com/google/devtools/build/lib/actions/SpawnResultTest.java
@@ -33,6 +33,7 @@
             .setStatus(SpawnResult.Status.TIMEOUT)
             .setWallTime(Duration.ofSeconds(5))
             .setExitCode(1)
+            .setRunnerName("test")
             .build();
     assertThat(r.getDetailMessage("", "", false, false))
         .contains("(failed due to timeout after 5.00 seconds.)");
@@ -41,7 +42,11 @@
   @Test
   public void getTimeoutMessageNoTime() {
     SpawnResult r =
-        new SpawnResult.Builder().setStatus(SpawnResult.Status.TIMEOUT).setExitCode(1).build();
+        new SpawnResult.Builder()
+            .setStatus(SpawnResult.Status.TIMEOUT)
+            .setExitCode(1)
+            .setRunnerName("test")
+            .build();
     assertThat(r.getDetailMessage("", "", false, false))
         .contains("(failed due to timeout.)");
   }