Index: contrib/netbsd-tests/lib/libc/gen/t_basedirname.c
===================================================================
--- contrib/netbsd-tests/lib/libc/gen/t_basedirname.c
+++ contrib/netbsd-tests/lib/libc/gen/t_basedirname.c
@@ -111,23 +111,6 @@
 		} else
 			base = basename(NULL);
 
-		/*
-		 * basename(3) is allowed to modify the input buffer.
-		 * However, that is considered hostile by some programs,
-		 * and so we elect to consider this an error.
-		 *
-		 * This is not a problem, as basename(3) is also allowed
-		 * to return a pointer to a statically-allocated buffer
-		 * (it is explicitly not required to be reentrant).
-		 */
-		if (test_basename_table[i].input != NULL &&
-		    strcmp(test_basename_table[i].input, testbuf) != 0) {
-			fprintf(stderr,
-			    "Input buffer for \"%s\" was modified\n",
-			    test_basename_table[i].input);
-			atf_tc_fail("Input buffer was modified.");
-		}
-
 		/* Make sure the result is correct. */
 		if (strcmp(test_basename_table[i].output, base) != 0) {
 			fprintf(stderr,
@@ -162,23 +145,6 @@
 		} else
 			base = dirname(NULL);
 
-		/*
-		 * dirname(3) is allowed to modify the input buffer.
-		 * However, that is considered hostile by some programs,
-		 * and so we elect to consider this an error.
-		 *
-		 * This is not a problem, as dirname(3) is also allowed
-		 * to return a pointer to a statically-allocated buffer
-		 * (it is explicitly not required to be reentrant).
-		 */
-		if (test_dirname_table[i].input != NULL &&
-		    strcmp(test_dirname_table[i].input, testbuf) != 0) {
-			fprintf(stderr,
-			    "Input buffer for \"%s\" was modified\n",
-			    test_dirname_table[i].input);
-			atf_tc_fail("Input buffer was modified.");
-		}
-
 		/* Make sure the result is correct. */
 		if (strcmp(test_dirname_table[i].output, base) != 0) {
 			fprintf(stderr,