diff --git a/Makefile b/Makefile
index e13efd265..c020f81a7 100644
--- a/Makefile
+++ b/Makefile
@@ -99,10 +99,10 @@ $(ROOT)/tests_extractor$(DOTEXE): tests_extractor.d
 
 test_tests_extractor: $(ROOT)/tests_extractor$(DOTEXE)
 	for file in ascii iteration ; do \
-		$< -i "./test/tests_extractor/$${file}.d" | diff --strip-trailing-cr -p - "./test/tests_extractor/$${file}.d.ext"; \
+		$< -i "./test/tests_extractor/$${file}.d" | diff -u --strip-trailing-cr -p - "./test/tests_extractor/$${file}.d.ext"; \
 	done
-	$< -a betterc -i "./test/tests_extractor/attributes.d" | diff --strip-trailing-cr -p - "./test/tests_extractor/attributes.d.ext";
-	$< --betterC -i "./test/tests_extractor/betterc.d" | diff --strip-trailing-cr -p - "./test/tests_extractor/betterc.d.ext";
+	$< -a betterc -i "./test/tests_extractor/attributes.d" | diff -u --strip-trailing-cr -p - "./test/tests_extractor/attributes.d.ext";
+	$< --betterC -i "./test/tests_extractor/betterc.d" | diff -u --strip-trailing-cr -p - "./test/tests_extractor/betterc.d.ext";
 
 RDMD_TEST_COMPILERS = $(DMD)
 RDMD_TEST_EXECUTABLE = $(ROOT)/rdmd$(DOTEXE)
diff --git a/rdmd_test.d b/rdmd_test.d
index 706538bb3..77f02e0bd 100755
--- a/rdmd_test.d
+++ b/rdmd_test.d
@@ -690,5 +690,5 @@ void runFallbackTest(string rdmdApp, string buildCompiler, string model)
 
     auto res = execute(rdmdApp ~ [modelSwitch(model), "--force", "--chatty", "--eval=writeln(`Compiler found.`);"]);
     enforce(res.status == 1, res.output);
-    enforce(res.output.canFind(format(`spawn [%(%s%),`, localDMD.only)), localDMD ~ " would not have been executed");
+    enforce(res.output.canFind(format(`spawn [%(%s%),`, localDMD.only)), localDMD ~ " would not have been executed. Output:\n" ~ res.output);
 }