diff --git a/lib/libutil/tests/expand_number_test.c b/lib/libutil/tests/expand_number_test.c
index 319df26c9621..42e3170ac4cf 100644
--- a/lib/libutil/tests/expand_number_test.c
+++ b/lib/libutil/tests/expand_number_test.c
@@ -1,87 +1,86 @@
 /*-
  * SPDX-License-Identifier: BSD-2-Clause
  *
  * Copyright (c) 2023 Google LLC
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
 
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
 #include <errno.h>
 #include <libutil.h>
 
 #include <atf-c.h>
 
 ATF_TC_WITHOUT_HEAD(positivetests);
 ATF_TC_BODY(positivetests, tc)
 {
 	int retval;
 	uint64_t num;
 
 #define positive_tc(string, value) 							\
 	do {										\
 		ATF_CHECK_ERRNO(0, (retval = expand_number((string), &num)) == 0);	\
 		ATF_CHECK_EQ(retval, 0);						\
 		ATF_CHECK_EQ(num, (value));						\
 	} while (0)
 
 	positive_tc("123456", 123456);
 	positive_tc("123456b", 123456);
 	positive_tc("1k", 1024);
 	positive_tc("1kb", 1024);
 	positive_tc("1K", 1024);
 	positive_tc("1KB", 1024);
 	positive_tc("1m", 1048576);
 	positive_tc("1M", 1048576);
 	positive_tc("1g", 1073741824);
 	positive_tc("1G", 1073741824);
 	positive_tc("1t", 1099511627776);
 	positive_tc("1T", 1099511627776);
 	positive_tc("1p", 1125899906842624);
 	positive_tc("1P", 1125899906842624);
 	positive_tc("1e", 1152921504606846976);
 	positive_tc("1E", 1152921504606846976);
 	positive_tc("15E", 17293822569102704640ULL);
 }
 
 ATF_TC_WITHOUT_HEAD(negativetests);
 ATF_TC_BODY(negativetests, tc)
 {
-	int retval;
 	uint64_t num;
 
-	ATF_CHECK_ERRNO(EINVAL, retval = expand_number("", &num));
-	ATF_CHECK_ERRNO(EINVAL, retval = expand_number("x", &num));
-	ATF_CHECK_ERRNO(EINVAL, retval = expand_number("1bb", &num));
-	ATF_CHECK_ERRNO(EINVAL, retval = expand_number("1x", &num));
-	ATF_CHECK_ERRNO(EINVAL, retval = expand_number("1kx", &num));
-	ATF_CHECK_ERRNO(ERANGE, retval = expand_number("16E", &num));
+	ATF_CHECK_ERRNO(EINVAL, expand_number("", &num));
+	ATF_CHECK_ERRNO(EINVAL, expand_number("x", &num));
+	ATF_CHECK_ERRNO(EINVAL, expand_number("1bb", &num));
+	ATF_CHECK_ERRNO(EINVAL, expand_number("1x", &num));
+	ATF_CHECK_ERRNO(EINVAL, expand_number("1kx", &num));
+	ATF_CHECK_ERRNO(ERANGE, expand_number("16E", &num));
 }
 
 ATF_TP_ADD_TCS(tp)
 {
 	ATF_TP_ADD_TC(tp, positivetests);
 	ATF_TP_ADD_TC(tp, negativetests);
 	return (atf_no_error());
 }