diff --git a/.gitignore b/.gitignore
index a7526b78..732cd41a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -37,6 +37,9 @@ lib*.pc
 /config.h
 /repmgr_version.h
 
+# test output
+/results/
+
 # other
 /.lineno
 *.dSYM
diff --git a/Makefile.in b/Makefile.in
index 036207e4..58f33654 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -13,6 +13,8 @@ DATA = \
   repmgr--unpackaged--4.0.sql \
   repmgr--4.0.sql
 
+REGRESS = repmgr_extension
+
 DOCS = README.md repmgr.conf.sample
 
 # Hacky workaround to install the binaries
diff --git a/expected/repmgr_extension.out b/expected/repmgr_extension.out
new file mode 100644
index 00000000..2fe7fd94
--- /dev/null
+++ b/expected/repmgr_extension.out
@@ -0,0 +1 @@
+CREATE EXTENSION repmgr;
diff --git a/sql/repmgr_extension.sql b/sql/repmgr_extension.sql
new file mode 100644
index 00000000..2fe7fd94
--- /dev/null
+++ b/sql/repmgr_extension.sql
@@ -0,0 +1 @@
+CREATE EXTENSION repmgr;