diff --git a/client/test/expected/00_installation_test.out b/client/test/expected/00_installation_test.out
index fe179b7..650b141 100644
--- a/client/test/expected/00_installation_test.out
+++ b/client/test/expected/00_installation_test.out
@@ -1,3 +1,5 @@
+-- Only show warning or error messages in the tests output
+SET client_min_messages TO WARNING;
 -- Install dependencies
 CREATE EXTENSION postgis;
 CREATE EXTENSION plpythonu;
diff --git a/client/test/sql/00_installation_test.sql b/client/test/sql/00_installation_test.sql
index f091cd4..49eab80 100644
--- a/client/test/sql/00_installation_test.sql
+++ b/client/test/sql/00_installation_test.sql
@@ -1,3 +1,5 @@
+-- Only show warning or error messages in the tests output
+SET client_min_messages TO WARNING;
 -- Install dependencies
 CREATE EXTENSION postgis;
 CREATE EXTENSION plpythonu;
diff --git a/server/extension/test/expected/00_install_test.out b/server/extension/test/expected/00_install_test.out
index f87ca05..cfb9ee7 100644
--- a/server/extension/test/expected/00_install_test.out
+++ b/server/extension/test/expected/00_install_test.out
@@ -1,3 +1,5 @@
+-- Only show warning or error messages in the tests output
+SET client_min_messages TO WARNING;
 -- Install dependencies
 CREATE EXTENSION postgis;
 CREATE EXTENSION plpythonu;
diff --git a/server/extension/test/sql/00_install_test.sql b/server/extension/test/sql/00_install_test.sql
index 9ffe2e1..2d7d41a 100644
--- a/server/extension/test/sql/00_install_test.sql
+++ b/server/extension/test/sql/00_install_test.sql
@@ -1,3 +1,5 @@
+-- Only show warning or error messages in the tests output
+SET client_min_messages TO WARNING;
 -- Install dependencies
 CREATE EXTENSION postgis;
 CREATE EXTENSION plpythonu;