diff --git a/scripts/build b/scripts/build
index 9274410488..01c5b52525 100755
--- a/scripts/build
+++ b/scripts/build
@@ -10,7 +10,7 @@ cd $basedir
 
 if [[ "$OSTYPE" == "cygwin" || "$OSTYPE" == "msys" ]]; then
     # Patch version.h
-    if [[ "$OPENRCT2_BUILD" != "" ]]; then
+    if [[ -n "$OPENRCT2_BUILD" ]]; then
         echo -e "\033[0;36mPatching version.h...\033[0m"
         fileversion=$OPENRCT2_VERSION.$OPENRCT2_BUILD
         productversion="$fileversion-${OPENRCT2_SHA1_SHORT}"
diff --git a/scripts/build-installer b/scripts/build-installer
index 2f2fb5adff..01a6784de3 100755
--- a/scripts/build-installer
+++ b/scripts/build-installer
@@ -17,7 +17,7 @@ if [[ "$1" == "-i" ]]; then
 fi
 
 basedir="$(readlink -f `dirname $0`/..)"
-if [[ "$output" == "" ]]; then
+if [[ -z "$output" ]]; then
     mkdir -p "$basedir/artifacts"
     output="$basedir/artifacts/openrct2-installer-$CONFIGURATION-$PLATFORM.exe"
 fi
diff --git a/scripts/linux/build-appimage.sh b/scripts/linux/build-appimage.sh
index 3c978a1cdf..cf37d7a365 100755
--- a/scripts/linux/build-appimage.sh
+++ b/scripts/linux/build-appimage.sh
@@ -1,7 +1,7 @@
 #!/bin/bash -ex
 
 # use RAM disk if possible
-if [ "$CI" == "" ] && [ -d /dev/shm ]; then
+if [ -z "$CI" ] && [ -d /dev/shm ]; then
     TEMP_BASE=/dev/shm
 else
     TEMP_BASE=/tmp
@@ -15,7 +15,7 @@ cleanup () {
     fi
 }
 
-if [ "$NO_CLEANUP" == "" ] && trap cleanup EXIT
+if [ -z "$NO_CLEANUP" ] && trap cleanup EXIT
 
 # store repo root as variable
 REPO_ROOT=$(readlink -f $(dirname "$0")/../..)
diff --git a/scripts/setenv b/scripts/setenv
index bfbeb369e6..8ca470d362 100755
--- a/scripts/setenv
+++ b/scripts/setenv
@@ -34,7 +34,7 @@ else
         export OPENRCT2_PUSH=true
     fi
 fi
-if [[ "$OPENRCT2_ORG_TOKEN" == "" ]]; then
+if [[ -z "$OPENRCT2_ORG_TOKEN" ]]; then
     unset OPENRCT2_PUSH
 fi
 
diff --git a/scripts/upload-backtrace-symbols b/scripts/upload-backtrace-symbols
index b4c5afefe7..e437817d1c 100755
--- a/scripts/upload-backtrace-symbols
+++ b/scripts/upload-backtrace-symbols
@@ -11,7 +11,7 @@ fi
 
 path=$1
 
-if [ "$BACKTRACE_IO_TOKEN" == "" ]; then
+if [ -z "$BACKTRACE_IO_TOKEN" ]; then
     echo -e "\033[0;31mBACKTRACE_IO_TOKEN not set"
     exit 1
 fi
diff --git a/scripts/upload-build b/scripts/upload-build
index 76e9cf5e3a..251df1a897 100755
--- a/scripts/upload-build
+++ b/scripts/upload-build
@@ -71,13 +71,13 @@ case "$flavour" in
         exit 1
 esac
 
-if [ "$branch" != "" ]; then
+if [ -n "$branch" ]; then
     versionextra=-$branch-${sha1:0:7}
 fi
 filename=OpenRCT2-$version$versionextra-$flavour
 
 echo -e "\033[0;36mUploading to openrct2.org as '$filename'..."
-if [ "$OPENRCT2_ORG_TOKEN" == "" ]; then
+if [ -z "$OPENRCT2_ORG_TOKEN" ]; then
     echo -e "\033[0;31mOPENRCT2_ORG_TOKEN not set"
     exit 1
 fi
diff --git a/src/openrct2-android/gradlew b/src/openrct2-android/gradlew
index 9d82f78915..14d3e67fd5 100755
--- a/src/openrct2-android/gradlew
+++ b/src/openrct2-android/gradlew
@@ -120,7 +120,7 @@ if $cygwin ; then
     done
     OURCYGPATTERN="(^($ROOTDIRS))"
     # Add a user-defined pattern to the cygpath arguments
-    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+    if [ -n "$GRADLE_CYGPATTERN" ] ; then
         OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
     fi
     # Now convert the arguments - kludge to limit ourselves to /bin/sh