diff --git a/Meta/WPT.sh b/Meta/WPT.sh
index 214c4fd4c30..093ef6be5d5 100755
--- a/Meta/WPT.sh
+++ b/Meta/WPT.sh
@@ -4,13 +4,14 @@ set -e
 
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
-LADYBIRD_SOURCE_DIR="$(realpath "${DIR}"/..)"
-WPT_SOURCE_DIR=${WPT_SOURCE_DIR:-"${LADYBIRD_SOURCE_DIR}/Tests/LibWeb/WPT/wpt"}
-WPT_REPOSITORY_URL=${WPT_REPOSITORY_URL:-"https://github.com/web-platform-tests/wpt.git"}
-
 # shellcheck source=/dev/null
 . "${DIR}/shell_include.sh"
 
+ensure_ladybird_source_dir
+
+WPT_SOURCE_DIR=${WPT_SOURCE_DIR:-"${LADYBIRD_SOURCE_DIR}/Tests/LibWeb/WPT/wpt"}
+WPT_REPOSITORY_URL=${WPT_REPOSITORY_URL:-"https://github.com/web-platform-tests/wpt.git"}
+
 default_binary_path() {
     if [ "$(uname -s)" = "Darwin" ]; then
         echo "${LADYBIRD_SOURCE_DIR}/Build/ladybird/bin/Ladybird.app/Contents/MacOS/"
diff --git a/Meta/ladybird.sh b/Meta/ladybird.sh
index b204b3c3b7d..8f2ed508429 100755
--- a/Meta/ladybird.sh
+++ b/Meta/ladybird.sh
@@ -83,10 +83,6 @@ EOF
 
 fi
 
-get_top_dir() {
-    git rev-parse --show-toplevel
-}
-
 create_build_dir() {
     check_program_version_at_least CMake cmake 3.25 || exit 1
     cmake --preset "$BUILD_PRESET" "${CMAKE_ARGS[@]}" -S "$LADYBIRD_SOURCE_DIR" -B "$BUILD_DIR"
@@ -97,10 +93,7 @@ cmd_with_target() {
     CMAKE_ARGS+=("-DCMAKE_C_COMPILER=${CC}")
     CMAKE_ARGS+=("-DCMAKE_CXX_COMPILER=${CXX}")
 
-    if [ ! -d "$LADYBIRD_SOURCE_DIR" ]; then
-        LADYBIRD_SOURCE_DIR="$(get_top_dir)"
-        export LADYBIRD_SOURCE_DIR
-    fi
+    ensure_ladybird_source_dir
 
     # Note: Keep in sync with buildDir defaults in CMakePresets.json
     case "${BUILD_PRESET}" in
diff --git a/Meta/shell_include.sh b/Meta/shell_include.sh
index 8be20ea96a9..b73d48b30bb 100644
--- a/Meta/shell_include.sh
+++ b/Meta/shell_include.sh
@@ -49,3 +49,14 @@ get_number_of_processing_units() {
 
   ($number_of_processing_units)
 }
+
+get_top_dir() {
+    git rev-parse --show-toplevel
+}
+
+ensure_ladybird_source_dir() {
+    if [ -z "$LADYBIRD_SOURCE_DIR" ] || [ ! -d "$LADYBIRD_SOURCE_DIR" ]; then
+        LADYBIRD_SOURCE_DIR="$(get_top_dir)"
+        export LADYBIRD_SOURCE_DIR
+    fi
+}