diff --git a/test/main.cc b/test/main.cc
index aeaa19cf..c00837fa 100644
--- a/test/main.cc
+++ b/test/main.cc
@@ -74,8 +74,8 @@ void __noreturn usage(void) {
       "  --speculum[=yes|NO]           Use internal `speculum` to check "
       "dataset\n"
       "Keys and Value:\n"
-      "  --keygen.min=N                Minimal keys length\n"
-      "  --keygen.max=N                Miximal keys length\n"
+      "  --keylen.min=N                Minimal keys length\n"
+      "  --keylen.max=N                Miximal keys length\n"
       "  --datalen.min=N               Minimal data length\n"
       "  --datalen.max=N               Miximal data length\n"
       "  --keygen.width=N              TBD (see the source code)\n"