diff --git a/include/tests_crypto b/include/tests_crypto
index b5f3c7be..77be22f2 100644
--- a/include/tests_crypto
+++ b/include/tests_crypto
@@ -140,7 +140,7 @@
         # cryptsetup only works as root
         if [ -n "${LSBLKBINARY}" -a -n "${CRYPTSETUPBINARY}" -a ${FORENSICS_MODE} -eq 0 ]; then
             for BLOCK_DEV in $(${LSBLKBINARY} --noheadings --list --paths -o NAME); do
-                if ${CRYPTSETUPBINARY} isLuks ${BLOCK_DEV}; then
+                if ${CRYPTSETUPBINARY} isLuks ${BLOCK_DEV} 2> /dev/null; then
                     LogText "Result: Found LUKS encrypted block device: ${BLOCK_DEV}"
                     Report "encryption[]=luks,block_device,${BLOCK_DEV}"
                     FOUND=$((FOUND +1))