diff --git a/src/kjv.re_c.c b/src/kjv.re_c.c
index ac77711..da03523 100644
--- a/src/kjv.re_c.c
+++ b/src/kjv.re_c.c
@@ -164,7 +164,9 @@ void kjv_(struct kjv *const kjv) {
 	verse_table_(&kjv->verses);
 }
 
-/** Loads 66 files from the "kjv/" directory. */
+/** Loads 66 files from the "kjv/" directory. Prints out something if it
+ doesn't work, but does not call `perror` or reset `errno`. Use
+ <fn:kjv_is_valid> to tell. */
 struct kjv kjv(void) {
 	const char *const dir_kjv = "kjv";
 	struct text backing;
diff --git a/test/test_kjv.c b/test/test_kjv.c
index 0ff16a0..65efd7f 100644
--- a/test/test_kjv.c
+++ b/test/test_kjv.c
@@ -2,6 +2,7 @@
 #include <stdio.h>
 #include <inttypes.h> /* C99 */
 #include <stdlib.h>
+#include <assert.h>
 
 int main(void) {
 	int success = EXIT_SUCCESS;
@@ -12,6 +13,8 @@ int main(void) {
 	kjv_add(&k, (union kjvcite){ .book = Genesis, .chapter = 1, .verse = 2 });
 	kjv_add(&k, (union kjvcite){ .book = Genesis, .chapter = 1, .verse = 1 });
 	fprintf(stderr, "%zu of which: %s.\n", k.set_words, kjv_set_to_string(&k));
+	assert(k.total_words == 789633);
+	assert(k.set_words == 39);
 	goto finally;
 catch:
 	success = EXIT_FAILURE, perror("kjv");