diff --git a/test/include/test/test.h b/test/include/test/test.h
index fd0e5265..07f58a47 100644
--- a/test/include/test/test.h
+++ b/test/include/test/test.h
@@ -336,3 +336,5 @@ test_status_t	p_test_no_malloc_init(test_t *t, ...);
 void	p_test_init(const char *name);
 void	p_test_fini(void);
 void	p_test_fail(const char *prefix, const char *message);
+
+void strncpy_cond(void *dst, const char *src, bool cond);
diff --git a/test/src/test.c b/test/src/test.c
index f97ce4d1..4583e55a 100644
--- a/test/src/test.c
+++ b/test/src/test.c
@@ -232,3 +232,16 @@ p_test_fail(const char *prefix, const char *message) {
 	malloc_cprintf(NULL, NULL, "%s%s\n", prefix, message);
 	test_status = test_status_fail;
 }
+
+void
+strncpy_cond(void *dst, const char *src, bool cond) {
+	if (cond) {
+		/*
+		 * Avoid strcpy and explicitly set length to 0 because the
+		 * `stringop-overflow` check may warn even if the specific test
+		 * is unreachable.
+		 */
+		size_t n = cond ? strlen(src) + 1 : 0;
+		strncpy(dst, src, n);
+	}
+}
diff --git a/test/unit/log.c b/test/unit/log.c
index a52bd737..10f45bc1 100644
--- a/test/unit/log.c
+++ b/test/unit/log.c
@@ -2,13 +2,18 @@
 
 #include "jemalloc/internal/log.h"
 
+static void
+update_log_var_names(const char *names) {
+	strncpy_cond(log_var_names, names, config_log);
+}
+
 static void
 expect_no_logging(const char *names) {
 	log_var_t log_l1 = LOG_VAR_INIT("l1");
 	log_var_t log_l2 = LOG_VAR_INIT("l2");
 	log_var_t log_l2_a = LOG_VAR_INIT("l2.a");
 
-	strcpy(log_var_names, names);
+	update_log_var_names(names);
 
 	int count = 0;
 
@@ -50,7 +55,7 @@ TEST_BEGIN(test_log_enabled_direct) {
 	int count;
 
 	count = 0;
-	strcpy(log_var_names, "l1");
+	update_log_var_names("l1");
 	for (int i = 0; i < 10; i++) {
 		log_do_begin(log_l1)
 			count++;
@@ -59,7 +64,7 @@ TEST_BEGIN(test_log_enabled_direct) {
 	assert_d_eq(count, 10, "Mis-logged!");
 
 	count = 0;
-	strcpy(log_var_names, "l1.a");
+	update_log_var_names("l1.a");
 	for (int i = 0; i < 10; i++) {
 		log_do_begin(log_l1_a)
 			count++;
@@ -68,7 +73,7 @@ TEST_BEGIN(test_log_enabled_direct) {
 	assert_d_eq(count, 10, "Mis-logged!");
 
 	count = 0;
-	strcpy(log_var_names, "l1.a|abc|l2|def");
+	update_log_var_names("l1.a|abc|l2|def");
 	for (int i = 0; i < 10; i++) {
 		log_do_begin(log_l1_a)
 			count++;
@@ -85,7 +90,7 @@ TEST_END
 TEST_BEGIN(test_log_enabled_indirect) {
 	test_skip_if(!config_log);
 	atomic_store_b(&log_init_done, true, ATOMIC_RELAXED);
-	strcpy(log_var_names, "l0|l1|abc|l2.b|def");
+	update_log_var_names("l0|l1|abc|l2.b|def");
 
 	/* On. */
 	log_var_t log_l1 = LOG_VAR_INIT("l1");
@@ -135,7 +140,7 @@ TEST_END
 TEST_BEGIN(test_log_enabled_global) {
 	test_skip_if(!config_log);
 	atomic_store_b(&log_init_done, true, ATOMIC_RELAXED);
-	strcpy(log_var_names, "abc|.|def");
+	update_log_var_names("abc|.|def");
 
 	log_var_t log_l1 = LOG_VAR_INIT("l1");
 	log_var_t log_l2_a_a = LOG_VAR_INIT("l2.a.a");