diff --git a/travis/test.sh b/travis/test.sh
index 4bb71b3..2bbb053 100755
--- a/travis/test.sh
+++ b/travis/test.sh
@@ -8,7 +8,7 @@ if [ "$ARCH" == "" ]; then
     exit 1
 fi
 
-TARGET=$1
+TARGET="$1"
 if [ "$TARGET" == "" ]; then
     echo 'Error: $TARGET is not set'
     exit 1
@@ -33,19 +33,19 @@ cleanup () {
 trap cleanup EXIT
 
 wget -N https://github.com/linuxdeploy/linuxdeploy/releases/download/continuous/linuxdeploy-"$ARCH".AppImage
-export LINUXDEPLOY_BIN=${PWD}/linuxdeploy-"$ARCH".AppImage
-chmod +x ${LINUXDEPLOY_BIN}
+export LINUXDEPLOY_BIN="$PWD"/linuxdeploy-"$ARCH".AppImage
+chmod +x "$LINUXDEPLOY_BIN"
 
 pushd "$BUILD_DIR"
 
 git clone --depth=1 https://github.com/linuxdeploy/linuxdeploy-plugin-qt-examples.git
 
 source /opt/qt510/bin/qt510-env.sh || echo ""   # hack required, otherwise the script will end whit 1
-mkdir -p $HOME/.config/qtchooser
-echo "${QTDIR}/bin" > $HOME/.config/qtchooser/qt5.10.conf
-echo "${QTDIR}/lib" >> $HOME/.config/qtchooser/qt5.10.conf
+mkdir -p "$HOME"/.config/qtchooser
+echo "${QTDIR}/bin" > "$HOME"/.config/qtchooser/qt5.10.conf
+echo "${QTDIR}/lib" >> "$HOME"/.config/qtchooser/qt5.10.conf
 
-export CMAKE_PREFIX_PATH=$QTDIR/lib/cmake
+export CMAKE_PREFIX_PATH="$QTDIR"/lib/cmake
 export QT_SELECT=qt5.10
 
 
@@ -53,37 +53,32 @@ export QT_SELECT=qt5.10
 pushd linuxdeploy-plugin-qt-examples/QtQuickControls2Application
     # This env variable is used by the qt plugin to search the qml sources in other paths than the AppDir
     # it's mandatory to use when your qml files are embed as Qt resources into the main binary.
-    export QML_SOURCES_PATHS="${PWD}/src"
-
-    # This env variable is used by the qt plugin to search the qml modules in other paths than the default
-    # Qt qml dir.
-    export QML_MODULES_PATHS="${QML_MODULES_PATHS}"
+    export QML_SOURCES_PATHS="$PWD"/src
 
     mkdir build
     pushd build
         cmake .. -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCMAKE_INSTALL_PREFIX=/usr || exit 1
-        DESTDIR=${PWD}/AppDir make install || exit 1
-
+        DESTDIR="$PWD"/AppDir make install || exit 1
 
-        ${LINUXDEPLOY_BIN} --appdir ${PWD}/AppDir --plugin qt --output appimage || return 1
-         mv -v *AppImage ${BUILD_DIR} || return 1
+        "$LINUXDEPLOY_BIN" --appdir "$PWD"/AppDir --plugin qt --output appimage || return 1
+         mv -v *AppImage "$BUILD_DIR" || return 1
     popd
 popd
 
 pushd linuxdeploy-plugin-qt-examples/QtWebEngineApplication
-    export QML_SOURCES_PATHS="${PWD}"
+    export QML_SOURCES_PATHS="$PWD"
 
     mkdir build
     pushd build
         qmake CONFIG+=release PREFIX=/usr ../QtWebEngineApplication.pro || exit 1
-        INSTALL_ROOT=${PWD}/AppDir make install || exit 1
+        INSTALL_ROOT="$PWD"/AppDir make install || exit 1
 
         # Include libnss related files
-        mkdir -p ${PWD}/AppDir/usr/lib/
-        cp -r /usr/lib/x86_64-linux-gnu/nss ${PWD}/AppDir/usr/lib/
+        mkdir -p "$PWD"/AppDir/usr/lib/
+        cp -r /usr/lib/x86_64-linux-gnu/nss "$PWD"/AppDir/usr/lib/
 
-        ${LINUXDEPLOY_BIN} --appdir ${PWD}/AppDir --plugin qt --output appimage || return 1
-         mv -v *AppImage ${BUILD_DIR} || return 1
+        "$LINUXDEPLOY_BIN" --appdir "$PWD"/AppDir --plugin qt --output appimage || return 1
+         mv -v *AppImage "$BUILD_DIR" || return 1
     popd
 popd
 
@@ -91,10 +86,9 @@ pushd linuxdeploy-plugin-qt-examples/QtWidgetsApplication
     mkdir build
     pushd build
         qmake CONFIG+=release PREFIX=/usr ../QtWidgetsApplication.pro || exit 1
-        INSTALL_ROOT=${PWD}/AppDir make install || exit 1
-
+        INSTALL_ROOT="$PWD"/AppDir make install || exit 1
 
-        ${LINUXDEPLOY_BIN} --appdir ${PWD}/AppDir --plugin qt --output appimage || return 1
-         mv -v *AppImage ${BUILD_DIR} || return 1
+        "$LINUXDEPLOY_BIN" --appdir "$PWD"/AppDir --plugin qt --output appimage || return 1
+         mv -v *AppImage "$BUILD_DIR" || return 1
     popd
 popd