diff --git a/tests/scripts/components-build-system.sh b/tests/scripts/components-build-system.sh
index a2c32f7..5467b60 100644
--- a/tests/scripts/components-build-system.sh
+++ b/tests/scripts/components-build-system.sh
@@ -135,7 +135,11 @@
     make
     ./cmake_package
     if [[ "$OSTYPE" == linux* ]]; then
-        PKG_CONFIG_PATH="${build_variant_dir}/mbedtls/pkgconfig" ${root_dir}/tests/scripts/pkgconfig.sh
+        PKG_CONFIG_PATH="${build_variant_dir}/mbedtls/pkgconfig" \
+        ${root_dir}/tests/scripts/pkgconfig.sh \
+        mbedtls mbedx509 mbedcrypto
+        # These are the EXPECTED package names. Renaming these could break
+        # consumers of pkg-config, consider carefully.
     fi
 }
 
diff --git a/tests/scripts/pkgconfig.sh b/tests/scripts/pkgconfig.sh
index 2702bfa..07a73b3 100755
--- a/tests/scripts/pkgconfig.sh
+++ b/tests/scripts/pkgconfig.sh
@@ -18,11 +18,14 @@
 
 set -e -u
 
-# These are the EXPECTED package names. Renaming these could break
-# consumers of pkg-config, consider carefully.
-all_pcs="mbedtls mbedx509 mbedcrypto"
+if [ $# -le 0 ]
+then
+    echo " [!] No package names specified" >&2
+    echo "Usage: $0 <package name 1> <package name 2> ..." >&2
+    exit 1
+fi
 
-for pc in $all_pcs; do
+for pc in "$@"; do
     printf "testing package config file: ${pc} ... "
     pkg-config --validate "${pc}"
     version="$(pkg-config --modversion "${pc}")"