diff --git a/utils/build_script_linux.sh b/utils/build_script_linux.sh
index 396c9703..6a0454b0 100755
--- a/utils/build_script_linux.sh
+++ b/utils/build_script_linux.sh
@@ -19,13 +19,13 @@ if [ -n "$build_prefix" ]; then
   build_prefix_label="$build_prefix "
 fi
 
-if [ -n "$testnet" ]; then
+if [ "$testnet" == true ]; then
   testnet_def="-D TESTNET=TRUE"
   testnet_label="testnet "
   ARCHIVE_NAME_PREFIX=${ARCHIVE_NAME_PREFIX}testnet-
 fi
 
-if [ -n "$testnet" ] || [ -n "$qt_dev_tools" ]; then
+if [ "$testnet" == true ] || [ -n "$qt_dev_tools" ]; then
   copy_qt_dev_tools=true
   copy_qt_dev_tools_label="devtools "
   ARCHIVE_NAME_PREFIX=${ARCHIVE_NAME_PREFIX}devtools-
diff --git a/utils/build_script_mac_osx.sh b/utils/build_script_mac_osx.sh
index d07ddba4..33509376 100755
--- a/utils/build_script_mac_osx.sh
+++ b/utils/build_script_mac_osx.sh
@@ -15,7 +15,7 @@ if [ -n "$build_prefix" ]; then
   build_prefix_label="$build_prefix "
 fi
 
-if [ -n "$testnet" ]; then
+if [ "$testnet" == true ]; then
   testnet_def="-D TESTNET=TRUE"
   testnet_label="testnet "
   ARCHIVE_NAME_PREFIX=${ARCHIVE_NAME_PREFIX}testnet-
diff --git a/utils/build_script_windows.bat b/utils/build_script_windows.bat
index 601b65d6..60e8f19d 100644
--- a/utils/build_script_windows.bat
+++ b/utils/build_script_windows.bat
@@ -12,7 +12,7 @@ IF NOT [%build_prefix%] == [] (
   SET ACHIVE_NAME_PREFIX=%ACHIVE_NAME_PREFIX%%build_prefix%-
 )
 
-IF NOT [%testnet%] == [] (
+IF "%testnet%" == "true" (
   SET TESTNET_DEF=-D TESTNET=TRUE
   SET TESTNET_LABEL=testnet 
   SET ACHIVE_NAME_PREFIX=%ACHIVE_NAME_PREFIX%testnet-