diff --git a/regress/Makefile b/regress/Makefile
index e0afb46..6d9d8ad 100644
--- a/regress/Makefile
+++ b/regress/Makefile
@@ -24,7 +24,6 @@ LTESTS= 	connect \
 		agent \
 		agent-getpeereid \
 		agent-timeout \
-		agent-ptrace \
 		keyscan \
 		keygen-change \
 		keygen-convert \
@@ -52,6 +51,9 @@ LTESTS= 	connect \
 		cert-userkey \
 		host-expand
 
+# works only with s-bits
+#		agent-ptrace \
+
 INTEROP_TESTS=	putty-transfer putty-ciphers putty-kex conch-ciphers
 #INTEROP_TESTS+=ssh-com ssh-com-client ssh-com-keygen ssh-com-sftp