diff --git a/src/node_main.cc b/src/node_main.cc
index 7cc5918b228ba8..2cd7502a2444fb 100644
--- a/src/node_main.cc
+++ b/src/node_main.cc
@@ -42,7 +42,10 @@ int wmain(int argc, wchar_t *wargv[]) {
 #else
 // UNIX
 int main(int argc, char *argv[]) {
-  setvbuf(stderr, NULL, _IOLBF, 1024);
+  // Disable stdio buffering, it interacts poorly with printf()
+  // calls elsewhere in the program (e.g., any logging from V8.)
+  setvbuf(stdout, nullptr, _IONBF, 0);
+  setvbuf(stderr, nullptr, _IONBF, 0);
   return node::Start(argc, argv);
 }
 #endif
diff --git a/test/parallel/parallel.status b/test/parallel/parallel.status
index c907c30a5cb43a..fc4d131b72f874 100644
--- a/test/parallel/parallel.status
+++ b/test/parallel/parallel.status
@@ -15,6 +15,7 @@ test-tick-processor     : PASS,FLAKY
 [$system==macos]
 
 [$system==solaris] # Also applies to SmartOS
+test-debug-signal-cluster         : PASS,FLAKY
 
 [$system==freebsd]