diff --git a/scripts/objc-test-ios.sh b/scripts/objc-test-ios.sh
index 6677e9cb21d..f6db784d99b 100755
--- a/scripts/objc-test-ios.sh
+++ b/scripts/objc-test-ios.sh
@@ -9,7 +9,7 @@ cd $ROOT
 XCODE_PROJECT="Examples/UIExplorer/UIExplorer.xcodeproj"
 XCODE_SCHEME="UIExplorer"
 XCODE_SDK="iphonesimulator"
-if [ -z "$XCODE_DESTINATION" ]; then
+if [ -z ${XCODE_DESTINATION+x} ]; then
   XCODE_DESTINATION="platform=iOS Simulator,name=iPhone 5s,OS=10.0"
 fi
 
diff --git a/scripts/objc-test-tvos.sh b/scripts/objc-test-tvos.sh
index 41c1b93d56f..039d0df9987 100755
--- a/scripts/objc-test-tvos.sh
+++ b/scripts/objc-test-tvos.sh
@@ -10,7 +10,7 @@ cd $ROOT
 XCODE_PROJECT="Examples/UIExplorer/UIExplorer.xcodeproj"
 XCODE_SCHEME="UIExplorer-tvOS"
 XCODE_SDK="appletvsimulator"
-if [ -z "$XCODE_DESTINATION" ]; then
+if [ -z ${XCODE_DESTINATION+x} ]; then
   XCODE_DESTINATION="platform=tvOS Simulator,name=Apple TV 1080p,OS=9.2"
 fi
 
diff --git a/scripts/objc-test.sh b/scripts/objc-test.sh
index c3fa20f5630..d9dda1a7fd2 100755
--- a/scripts/objc-test.sh
+++ b/scripts/objc-test.sh
@@ -34,9 +34,17 @@ fi
 # TODO: We use xcodebuild because xctool would stall when collecting info about
 # the tests before running them. Switch back when this issue with xctool has
 # been resolved.
-xcodebuild \
-  -project $XCODE_PROJECT \
-  -scheme $XCODE_SCHEME \
-  -sdk $XCODE_SDK \
-  -destination "$XCODE_DESTINATION" \
-  $XCODE_BUILD_STEPS
+if [ -n "$XCODE_DESTINATION" ]; then
+  xcodebuild \
+    -project $XCODE_PROJECT \
+    -scheme $XCODE_SCHEME \
+    -sdk $XCODE_SDK \
+    -destination "$XCODE_DESTINATION" \
+    $XCODE_BUILD_STEPS
+else
+  xcodebuild \
+    -project $XCODE_PROJECT \
+    -scheme $XCODE_SCHEME \
+    -sdk $XCODE_SDK \
+    $XCODE_BUILD_STEPS
+fi