diff --git a/t/buf-simple.c b/t/buf-simple.c
index ff22aa10..72d9fd40 100644
--- a/t/buf-simple.c
+++ b/t/buf-simple.c
@@ -12,8 +12,6 @@
 static void
 test_expand_title(void **state)
 {
-	(void)state;
-
 	struct buf s = BUF_INIT;
 
 	char TEMPLATE[] = "foo ~/bar";
@@ -58,8 +56,6 @@ test_expand_title(void **state)
 static void
 test_buf_add_fmt(void **state)
 {
-	(void)state;
-
 	struct buf s = BUF_INIT;
 
 	buf_add(&s, "foo");
@@ -72,8 +68,6 @@ test_buf_add_fmt(void **state)
 static void
 test_buf_add_char(void **state)
 {
-	(void)state;
-
 	const char long_string[] = "123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890";
 	size_t len = strlen(long_string);
 
diff --git a/t/str.c b/t/str.c
index 79debb1c..159f95d3 100644
--- a/t/str.c
+++ b/t/str.c
@@ -11,8 +11,6 @@
 static void
 test_str_starts_with(void **state)
 {
-	(void)state;
-
 	assert_true(str_starts_with("  foo", 'f', " \t\r\n"));
 	assert_true(str_starts_with("f", 'f', " \t\r\n"));
 	assert_false(str_starts_with("  foo", '<', " "));
diff --git a/t/xml.c b/t/xml.c
index a7be6b87..f4c70744 100644
--- a/t/xml.c
+++ b/t/xml.c
@@ -100,8 +100,6 @@ struct test_case {
 static void
 test_lab_xml_expand_dotted_attributes(void **state)
 {
-	(void)state;
-
 	for (size_t i = 0; i < ARRAY_SIZE(test_cases); i++) {
 		xmlDoc *doc = xmlReadDoc((xmlChar *)test_cases[i].before,
 					NULL, NULL, 0);