diff --git a/src/java/io/bazel/rulesscala/worker/WorkerTest.java b/src/java/io/bazel/rulesscala/worker/WorkerTest.java
index 4419ee2ea..80b60ddbf 100644
--- a/src/java/io/bazel/rulesscala/worker/WorkerTest.java
+++ b/src/java/io/bazel/rulesscala/worker/WorkerTest.java
@@ -55,7 +55,12 @@ public void work(String[] args) {
             }
           };
 
-      String contents = "line 1\n--flag_1\nsome arg\n";
+      String contents = String.join(
+        System.getProperty("line.separator"),
+        "line 1",
+        "--flag_1",
+        "some arg",
+        "");  // The output will always have a line separator at the end.
 
       Files.write(tmpFile, contents.getBytes(StandardCharsets.UTF_8));
 
@@ -69,8 +74,8 @@ public void work(String[] args) {
       WorkerProtocol.WorkResponse response =
           WorkerProtocol.WorkResponse.parseDelimitedFrom(helper.responseIn);
 
-      assertEquals(response.getExitCode(), 0);
-      assertEquals(response.getOutput(), contents);
+      assertEquals(0, response.getExitCode());
+      assertEquals(contents, response.getOutput());
     } finally {
       Files.deleteIfExists(tmpFile);
     }
diff --git a/test_rules_scala.sh b/test_rules_scala.sh
index d05abddaa..e1c362c06 100755
--- a/test_rules_scala.sh
+++ b/test_rules_scala.sh
@@ -11,20 +11,21 @@ test_dir=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )/test/shell
 # shellcheck source=./test_runner.sh
 . "${test_dir}"/test_runner.sh
 runner=$(get_test_runner "${1:-local}")
+test_output_flag="--test_output=errors"
 
 . "${test_dir}"/test_bzlmod_macros.sh
-$runner bazel build test/...
-#$runner bazel build "test/... --all_incompatible_changes"
-$runner bazel test test/...
-$runner bazel test third_party/...
+$runner bazel build "src/... test/..."
+#$runner bazel build "src/... test/... --all_incompatible_changes"
+$runner bazel test "${test_output_flag} src/... test/..."
+$runner bazel test "${test_output_flag} third_party/..."
 $runner bazel build "--extra_toolchains=//test/toolchains:high_level_transitive_deps_strict_deps_error -- test/..."
 $runner bazel build "--extra_toolchains=//scala:minimal_direct_source_deps -- test/..."
 #$runner bazel build "--extra_toolchains=//test/toolchains:high_level_transitive_deps_strict_deps_error --all_incompatible_changes -- test/..."
-$runner bazel test "--extra_toolchains=//test/toolchains:high_level_transitive_deps_strict_deps_error -- test/..."
-$runner bazel test "--extra_toolchains=//scala:minimal_direct_source_deps -- test/..."
+$runner bazel test "${test_output_flag} --extra_toolchains=//test/toolchains:high_level_transitive_deps_strict_deps_error -- test/..."
+$runner bazel test "${test_output_flag} --extra_toolchains=//scala:minimal_direct_source_deps -- test/..."
 $runner bazel build "test_expect_failure/missing_direct_deps/internal_deps/... --strict_java_deps=warn --extra_toolchains=//test/toolchains:high_level_transitive_deps_strict_deps_warn"
 $runner bazel build //test_expect_failure/proto_source_root/... --strict_proto_deps=off
-$runner bazel test //test/... --extra_toolchains="//test_expect_failure/plus_one_deps:plus_one_deps"
+$runner bazel test "$test_output_flag" //test/... --extra_toolchains="//test_expect_failure/plus_one_deps:plus_one_deps"
 $runner bazel build test:ScalaBinaryInGenrule --nolegacy_external_runfiles
 $runner bazel build //test_statsfile:Simple_statsfile
 $runner bazel build //test_statsfile:SimpleNoStatsFile_statsfile --extra_toolchains="//test/toolchains:enable_stats_file_disabled_toolchain"