diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py
index 29b6b9a..358c92d 100644
--- a/Lib/test/test_os.py
+++ b/Lib/test/test_os.py
@@ -1282,7 +1282,7 @@
             try:
                 os.setpriority(os.PRIO_PROCESS, os.getpid(), base)
             except OSError as err:
-                if err.errno != EACCESS:
+                if err.errno != errno.EACCESS:
                     raise
 
 
@@ -1376,7 +1376,8 @@
 
     DATA = b"12345abcde" * 1024 * 1024  # 10 Mb
     SUPPORT_HEADERS_TRAILERS = not sys.platform.startswith("linux") and \
-                               not sys.platform.startswith("solaris")
+                               not sys.platform.startswith("solaris") and \
+                               not sys.platform.startswith("sunos")
 
     @classmethod
     def setUpClass(cls):