diff --git a/0001-Don-t-build-and-install-docs.patch b/0001-Don-t-build-and-install-docs.patch
index 078fa09..5941a90 100644
--- a/0001-Don-t-build-and-install-docs.patch
+++ b/0001-Don-t-build-and-install-docs.patch
@@ -1,7 +1,7 @@
-From 4d9f077d16ad9f10ed457f1659015f120b3489ac Mon Sep 17 00:00:00 2001
+From 1dbbee792ff2f4915554684097467e10150f2f40 Mon Sep 17 00:00:00 2001
 From: Michael Simacek <msimacek@redhat.com>
 Date: Tue, 6 Sep 2016 12:10:03 +0200
-Subject: [PATCH 1/3] Don't build and install docs
+Subject: [PATCH 1/4] Don't build and install docs
 
 ---
  build   | 2 --
diff --git a/0002-Fix-generation-of-versioned-OSGi-requires.patch b/0002-Fix-generation-of-versioned-OSGi-requires.patch
index 1a0d4b6..1ce67a4 100644
--- a/0002-Fix-generation-of-versioned-OSGi-requires.patch
+++ b/0002-Fix-generation-of-versioned-OSGi-requires.patch
@@ -1,7 +1,7 @@
-From 14a281a4ada0a175eebbf9601d42b2d882fc11d6 Mon Sep 17 00:00:00 2001
+From 92197a0f3b4eb02ecaaa562a24f3dd698bbf790f Mon Sep 17 00:00:00 2001
 From: Mikolaj Izdebski <mizdebsk@redhat.com>
 Date: Fri, 30 Sep 2016 12:31:40 +0200
-Subject: [PATCH 2/3] Fix generation of versioned OSGi requires
+Subject: [PATCH 2/4] Fix generation of versioned OSGi requires
 
 Fixes #26
 ---
diff --git a/0003-Avoid-calling-zipfile.open-.-rU.patch b/0003-Avoid-calling-zipfile.open-.-rU.patch
index 9ec5243..54acc28 100644
--- a/0003-Avoid-calling-zipfile.open-.-rU.patch
+++ b/0003-Avoid-calling-zipfile.open-.-rU.patch
@@ -1,7 +1,7 @@
-From f0196bad669f0a46a33f7fa2f5afb85d00204cf3 Mon Sep 17 00:00:00 2001
+From 9cfefd513b07bea9e0d215db1d58f7b060da5213 Mon Sep 17 00:00:00 2001
 From: Mikolaj Izdebski <mizdebsk@redhat.com>
 Date: Tue, 20 Dec 2016 10:15:38 +0100
-Subject: [PATCH 3/3] Avoid calling zipfile.open(..., "rU")
+Subject: [PATCH 3/4] Avoid calling zipfile.open(..., "rU")
 
 Fixes: #33
 ---
diff --git a/0004-Force-locale-in-tests.patch b/0004-Force-locale-in-tests.patch
new file mode 100644
index 0000000..144e520
--- /dev/null
+++ b/0004-Force-locale-in-tests.patch
@@ -0,0 +1,26 @@
+From a8432ff0499c3832246ad7ffcdf9202dc4f29285 Mon Sep 17 00:00:00 2001
+From: Michael Simacek <msimacek@redhat.com>
+Date: Tue, 14 Mar 2017 11:01:57 +0100
+Subject: [PATCH 4/4] Force locale in tests
+
+---
+ test/test_common.py | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/test/test_common.py b/test/test_common.py
+index 9f7c2fd..914e97b 100644
+--- a/test/test_common.py
++++ b/test/test_common.py
+@@ -16,7 +16,8 @@ from lxml import etree
+ DIRPATH = path.dirname(path.realpath(__file__))
+ SCRIPT_ENV = {'PATH':'{mock}:{real}'.format(mock=DIRPATH,
+                                             real=os.environ['PATH']),
+-              'PYTHONPATH':os.environ['PYTHONPATH']}
++              'PYTHONPATH':os.environ['PYTHONPATH'],
++              'LC_ALL': 'C.UTF-8'}
+ 
+ 
+ def call_script(name, args, stdin=None, extra_env={}):
+-- 
+2.9.3
+
diff --git a/javapackages-tools.spec b/javapackages-tools.spec
index cff496b..3eb59fe 100644
--- a/javapackages-tools.spec
+++ b/javapackages-tools.spec
@@ -10,7 +10,7 @@
 
 Name:           javapackages-tools
 Version:        4.7.0
-Release:        15%{?dist}
+Release:        16%{?dist}
 
 Summary:        Macros and scripts for Java packaging support
 
@@ -23,6 +23,8 @@ Patch0:         0001-Don-t-build-and-install-docs.patch
 Patch1:         0002-Fix-generation-of-versioned-OSGi-requires.patch
 # https://github.com/fedora-java/javapackages/issues/33
 Patch2:         0003-Avoid-calling-zipfile.open-.-rU.patch
+# Fixes test failures due to warnings from python
+Patch3:         0004-Force-locale-in-tests.patch
 
 BuildArch:      noarch
 
@@ -131,6 +133,7 @@ This package provides non-essential macros and scripts to support Java packaging
 %patch0 -p1
 %patch1 -p1
 %patch2 -p1
+%patch3 -p1
 
 %build
 %configure --pyinterpreter=%{__python3}
@@ -172,6 +175,9 @@ rm -rf %{buildroot}%{_mandir}/man7/gradle_build.7
 %{python3_sitelib}/javapackages*
 
 %changelog
+* Tue Mar 14 2017 Michael Simacek <msimacek@redhat.com> - 4.7.0-16
+- Force locale in test to fix failures
+
 * Fri Feb 10 2017 Fedora Release Engineering <releng@fedoraproject.org> - 4.7.0-15
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild