diff --git a/tools/publish.sh b/tools/publish.sh
index 4aa6e2dc..502c3d9f 100755
--- a/tools/publish.sh
+++ b/tools/publish.sh
@@ -4,7 +4,7 @@ IFS=$'\n\t'
 cd "$(dirname "$0")"/..
 
 # shellcheck disable=SC2154
-trap 's=$?; echo >&2 "$0: Error on line "${LINENO}": ${BASH_COMMAND}"; exit ${s}' ERR
+trap 's=$?; echo >&2 "$0: error on line "${LINENO}": ${BASH_COMMAND}"; exit ${s}' ERR
 
 # Publish a new release.
 #
diff --git a/tools/tidy.sh b/tools/tidy.sh
index 10f2a4c9..1f2fda37 100755
--- a/tools/tidy.sh
+++ b/tools/tidy.sh
@@ -6,7 +6,7 @@ IFS=$'\n\t'
 cd "$(dirname "$0")"/..
 
 # shellcheck disable=SC2154
-trap 's=$?; echo >&2 "$0: Error on line "${LINENO}": ${BASH_COMMAND}"; exit ${s}' ERR
+trap 's=$?; echo >&2 "$0: error on line "${LINENO}": ${BASH_COMMAND}"; exit ${s}' ERR
 
 # USAGE:
 #    ./tools/tidy.sh