TS-40724 Show stderr for during testing

build.gradle

@@ -129,7 +129,7 @@ extensions.runtime.targetPlatforms.get().each { targetPlatform ->
 		}
 		from(readmeFilePath) {
 			// rename copied file to "Readme.md"
-			rename (oldFilename -> "README.md")
+			rename(oldFilename -> "README.md")
 			into "${application.applicationName}"
 		}
 	}
@@ -141,4 +141,8 @@ test {
 		// Don't run the integration test for the graal-vm distribution artifact here. (This is the jlink build.)
 		excludeTestsMatching('com.teamscale.upload.NativeImageIT')
 	}
+	testLogging {
+		outputs.upToDateWhen { false }
+		showStandardStreams = true
+	}
 }