diff --git a/.gitmodules b/.gitmodules
index 111c39c..ffb9af9 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,4 +1,4 @@
 [submodule "lib/pyyaml"]
 	path = lib/pyyaml
-	url = https://github.com/anishathalye/pyyaml
+	url = https://github.com/yaml/pyyaml
 	ignore = dirty
diff --git a/lib/pyyaml b/lib/pyyaml
index f30c956..7e026bf 160000
--- a/lib/pyyaml
+++ b/lib/pyyaml
@@ -1 +1 @@
-Subproject commit f30c956c11aa6b5e7827fe5840cc9ed40b938d17
+Subproject commit 7e026bfee9cc0bddeb1bbca0c4a0bcd826c2bfdf
diff --git a/test/Vagrantfile b/test/Vagrantfile
index 8ce1739..05d6747 100644
--- a/test/Vagrantfile
+++ b/test/Vagrantfile
@@ -2,8 +2,7 @@ Vagrant.configure(2) do |config|
   config.vm.box = 'debian/stretch64'
 
   # sync by copying for isolation
-  config.vm.synced_folder "..", "/dotbot", type: "rsync",
-    rsync__exclude: ".git/"
+  config.vm.synced_folder "..", "/dotbot", type: "rsync"
 
   # disable default synced folder
   config.vm.synced_folder ".", "/vagrant", disabled: true
diff --git a/test/test-lib.bash b/test/test-lib.bash
index 008c2f8..b334b81 100644
--- a/test/test-lib.bash
+++ b/test/test-lib.bash
@@ -1,10 +1,6 @@
 DEBUG=${DEBUG:-false}
 USE_VAGRANT=${USE_VAGRANT:-true}
-if ${USE_VAGRANT}; then
-    DOTBOT_EXEC=${DOTBOT_EXEC:-"python /dotbot/bin/dotbot"}
-else
-    DOTBOT_EXEC=${DOTBOT_EXEC:-"/dotbot/bin/dotbot"}
-fi
+DOTBOT_EXEC=${DOTBOT_EXEC:-"python /dotbot/bin/dotbot"}
 DOTFILES="/home/$(whoami)/dotfiles"
 INSTALL_CONF='install.conf.yaml'
 INSTALL_CONF_JSON='install.conf.json'
diff --git a/test/test_travis b/test/test_travis
index 20ec1ae..79439e1 100755
--- a/test/test_travis
+++ b/test/test_travis
@@ -6,7 +6,7 @@ set -e
 # set -x
 # set -v
 
-BASEDIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+export BASEDIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
 
 # Prevent execution outside of Travis CI builds
 if [[ "${TRAVIS}" != true || "${CI}" != true ]]; then
diff --git a/test/tests/shim.bash b/test/tests/shim.bash
new file mode 100644
index 0000000..2ed7d54
--- /dev/null
+++ b/test/tests/shim.bash
@@ -0,0 +1,29 @@
+test_description='install shim works'
+. '../test-lib.bash'
+
+test_expect_success 'setup' '
+cd ${DOTFILES}
+git init
+if ${USE_VAGRANT}; then
+    git submodule add /dotbot dotbot
+else
+    git submodule add ${BASEDIR} dotbot
+fi
+cp ./dotbot/tools/git-submodule/install .
+echo "pear" > ${DOTFILES}/foo
+'
+
+test_expect_success 'run' '
+cat > ${DOTFILES}/install.conf.yaml <<EOF
+- link:
+    ~/.foo: foo
+EOF
+if ! ${USE_VAGRANT}; then
+    sed -i "" "1 s/sh$/python/" ${DOTFILES}/dotbot/bin/dotbot
+fi
+${DOTFILES}/install
+'
+
+test_expect_success 'test' '
+grep "pear" ~/.foo
+'
diff --git a/tools/git-submodule/install b/tools/git-submodule/install
index b1baa33..f11b48b 100755
--- a/tools/git-submodule/install
+++ b/tools/git-submodule/install
@@ -9,6 +9,7 @@ DOTBOT_BIN="bin/dotbot"
 BASEDIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 
 cd "${BASEDIR}"
+git -C "${DOTBOT_DIR}" submodule sync --recursive
 git submodule update --init --recursive "${DOTBOT_DIR}"
 
 "${BASEDIR}/${DOTBOT_DIR}/${DOTBOT_BIN}" -d "${BASEDIR}" -c "${CONFIG}" "${@}"