diff --git a/.travis.yml b/.travis.yml
index ac2686d..e3d7a6d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,6 @@
 language: c
+dist: precise
+sudo: required
 
 env:
   global:
@@ -42,9 +44,9 @@ before_install:
   - sudo apt-get -y remove --purge postgis-2.2
   - sudo apt-get -y autoremove
 
-  - sudo apt-get -y install postgresql-9.5=9.5.2-3cdb2
-  - sudo apt-get -y install postgresql-server-dev-9.5=9.5.2-3cdb2
-  - sudo apt-get -y install postgresql-plpython-9.5=9.5.2-3cdb2
+  - sudo apt-get -y install postgresql-9.5=9.5.2-3cdb3
+  - sudo apt-get -y install postgresql-server-dev-9.5=9.5.2-3cdb3
+  - sudo apt-get -y install postgresql-plpython-9.5=9.5.2-3cdb3
   - sudo apt-get -y install postgresql-9.5-postgis-scripts=2.2.2.0-cdb2
   - sudo apt-get -y install postgresql-9.5-postgis-2.2=2.2.2.0-cdb2
 
diff --git a/Makefile.global b/Makefile.global
index da85992..140d486 100644
--- a/Makefile.global
+++ b/Makefile.global
@@ -4,3 +4,5 @@ PACKAGE           = crankshaft
 EXTVERSION        = $(shell grep default_version $(SELF_DIR)/src/pg/$(EXTENSION).control | sed -e "s/default_version[[:space:]]*=[[:space:]]*'\([^']*\)'/\1/")
 RELEASE_VERSION  ?= $(EXTVERSION)
 SED               = sed
+PIP               = pip
+NOSETESTS         = nosetests
diff --git a/src/pg/Makefile b/src/pg/Makefile
index 6775aad..c6fe484 100644
--- a/src/pg/Makefile
+++ b/src/pg/Makefile
@@ -25,7 +25,7 @@ $(DATA): $(SOURCES_DATA)
 	$(SED) $(REPLACEMENTS) $(SOURCES_DATA_DIR)/*.sql > $@
 
 TEST_DIR = test
-REGRESS = $(notdir $(basename $(wildcard $(TEST_DIR)/sql/*test.sql)))
+REGRESS = $(sort $(notdir $(basename $(wildcard $(TEST_DIR)/sql/*test.sql))))
 REGRESS_OPTS = --inputdir='$(TEST_DIR)' --outputdir='$(TEST_DIR)'
 
 PG_CONFIG = pg_config
diff --git a/src/pg/test/expected/01_install_test.out b/src/pg/test/expected/01_install_test.out
index c8a763e..79ff047 100644
--- a/src/pg/test/expected/01_install_test.out
+++ b/src/pg/test/expected/01_install_test.out
@@ -1,6 +1,6 @@
 -- Install dependencies
 CREATE EXTENSION plpythonu;
-CREATE EXTENSION postgis VERSION '2.2.2';
+CREATE EXTENSION postgis;
 -- Create role publicuser if it does not exist
 DO
 $$
diff --git a/src/pg/test/sql/01_install_test.sql b/src/pg/test/sql/01_install_test.sql
index c90ea59..98d7db4 100644
--- a/src/pg/test/sql/01_install_test.sql
+++ b/src/pg/test/sql/01_install_test.sql
@@ -1,6 +1,6 @@
 -- Install dependencies
 CREATE EXTENSION plpythonu;
-CREATE EXTENSION postgis VERSION '2.2.2';
+CREATE EXTENSION postgis;
 
 -- Create role publicuser if it does not exist
 DO
diff --git a/src/py/Makefile b/src/py/Makefile
index cc3c67e..cc22ed8 100644
--- a/src/py/Makefile
+++ b/src/py/Makefile
@@ -2,11 +2,11 @@ include ../../Makefile.global
 
 # Install the package locally for development
 install:
-	pip install --upgrade ./crankshaft
+	$(PIP) install --upgrade ./crankshaft
 
 # Test develpment install
 test:
-	nosetests crankshaft/test/
+	$(NOSETESTS) crankshaft/test/
 
 release: ../../release/$(EXTENSION).control $(SOURCES_DATA)
 	mkdir -p ../../release/python/$(EXTVERSION)
@@ -14,4 +14,4 @@ release: ../../release/$(EXTENSION).control $(SOURCES_DATA)
 	$(SED) -i -r 's/version='"'"'[0-9]+\.[0-9]+\.[0-9]+'"'"'/version='"'"'$(EXTVERSION)'"'"'/g'  ../../release/python/$(EXTVERSION)/$(PACKAGE)/setup.py
 
 deploy: 
-	pip install $(RUN_OPTIONS) --upgrade ../../release/python/$(RELEASE_VERSION)/$(PACKAGE)
+	$(PIP) install $(RUN_OPTIONS) --upgrade ../../release/python/$(RELEASE_VERSION)/$(PACKAGE)