diff --git a/.gitignore b/.gitignore
index 9c529554..78018a46 100644
--- a/.gitignore
+++ b/.gitignore
@@ -30,6 +30,10 @@ doc/html/*
 /COPYING.txt
 /build/
 
+# Outsourced build test
+/_build/
+/_install/
+
 # CTest-generated files
 /CTestTestfile.cmake
 /Testing/
diff --git a/test-outsourced-build.sh b/test-outsourced-build.sh
new file mode 100755
index 00000000..6858beec
--- /dev/null
+++ b/test-outsourced-build.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+rm -rf _build _install
+mkdir _build _install
+cd _build
+rm -f ../CMakeCache.txt ../vmime/config.hpp ../vmime/export-static.hpp ../vmime/export-shared.hpp
+#cmake .. -DCMAKE_INSTALL_PREFIX=../_install -DVMIME_BUILD_SHARED_LIBRARY=NO
+#cmake .. -DCMAKE_INSTALL_PREFIX=../_install -DVMIME_BUILD_TESTS=YES
+cmake .. -DCMAKE_INSTALL_PREFIX=../_install -DVMIME_BUILD_TESTS=YES -DVMIME_TLS_SUPPORT_LIB_IS_OPENSSL=ON -DVMIME_TLS_SUPPORT_LIB_IS_GNUTLS=OFF -DCMAKE_BUILD_TYPE=Release
+cmake .. -L
+make
+make install
+