Automatic code cleanup.

PiperOrigin-RevId: 355876123
diff --git a/src/test/java/com/google/devtools/build/lib/windows/WindowsSubprocessTest.java b/src/test/java/com/google/devtools/build/lib/windows/WindowsSubprocessTest.java
index a305285..b737521 100644
--- a/src/test/java/com/google/devtools/build/lib/windows/WindowsSubprocessTest.java
+++ b/src/test/java/com/google/devtools/build/lib/windows/WindowsSubprocessTest.java
@@ -140,8 +140,8 @@
     // Windows allows streams to be read after the process has died.
     assertThat(inputStream.available()).isAnyOf(0, 5);
     inputStream.close();
-    assertThrows(IllegalStateException.class, inputStream::available)
-        .getMessage()
+    assertThat(assertThrows(IllegalStateException.class, inputStream::available))
+        .hasMessageThat()
         .contains("Stream already closed");
   }