--- a/Makefile
+++ b/Makefile
@@ -8,6 +8,7 @@ endif
 
 MODULE_big	= pgnodemx
 OBJS		= pgnodemx.o cgroup.o envutils.o fileutils.o genutils.o kdapi.o parseutils.o procfunc.o
+REGRESS		= smoketest
 PG_CPPFLAGS	= -I$(libpq_srcdir)
 PATH_TO_FILE	= $(datadir)/extension/pg_proctab.control
 ifeq ($(shell test -e $(PATH_TO_FILE) && echo -n yes),yes)
--- /dev/null
+++ b/sql/smoketest.sql
@@ -0,0 +1,2 @@
+create extension pgnodemx;
+select openssl_version() ~ 'OpenSSL' as openssl_version;
--- /dev/null
+++ b/expected/smoketest.out
@@ -0,0 +1,7 @@
+create extension pgnodemx;
+select openssl_version() ~ 'OpenSSL' as openssl_version;
+ openssl_version 
+-----------------
+ t
+(1 row)
+
