Index: uspace/lib/c/test/capa.c
===================================================================
--- uspace/lib/c/test/capa.c	(revision ca48672c28630656df768752aa9bc313ce9ad11c)
+++ uspace/lib/c/test/capa.c	(revision c111da2e5d8d220f8936c4d80df74d461f2e0866)
@@ -1,3 +1,4 @@
 /*
+ * Copyright (c) 2025 Jiri Svoboda
  * Copyright (c) 2019 Matthieu Riolo
  * All rights reserved.
@@ -285,3 +286,22 @@
 }
 
+PCUT_TEST(capa_blocks_format)
+{
+	errno_t rc;
+	char *str;
+
+	rc = capa_blocks_format(42, 1, &str);
+	PCUT_ASSERT_ERRNO_VAL(EOK, rc);
+	PCUT_ASSERT_STR_EQUALS("42 B", str);
+	free(str);
+}
+
+PCUT_TEST(capa_blocks_format_buf)
+{
+	char str[CAPA_BLOCKS_BUFSIZE];
+
+	capa_blocks_format_buf(42, 1, str, sizeof(str));
+	PCUT_ASSERT_STR_EQUALS("42 B", str);
+}
+
 PCUT_EXPORT(capa);