diff --git a/lib/test/test_assert.sh b/lib/test/test_assert.sh
index 1fe328c..a3bd4ed 100644
--- a/lib/test/test_assert.sh
+++ b/lib/test/test_assert.sh
@@ -17,6 +17,7 @@
 #
 :PREFIX:assert() {
 	if [[ "$1" = "!" ]]; then
+		shift
 		if ! "$@" &>/dev/null; then
 			return 0
 		fi
diff --git a/lib/test/test_expect.sh b/lib/test/test_expect.sh
index 8c87e2d..fadd029 100644
--- a/lib/test/test_expect.sh
+++ b/lib/test/test_expect.sh
@@ -17,6 +17,7 @@
 #
 :PREFIX:expect() {
 	if [[ "$1" = "!" ]]; then
+		shift
 		if ! "$@" &>/dev/null; then
 			return 0
 		fi