diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 733ee2ac0138..9ac4cb3eb20b 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -2703,18 +2703,6 @@ config MEMCPY_KUNIT_TEST
 
 	  If unsure, say N.
 
-config MEMCPY_SLOW_KUNIT_TEST
-	bool "Include exhaustive memcpy tests"
-	depends on MEMCPY_KUNIT_TEST
-	default y
-	help
-	  Some memcpy tests are quite exhaustive in checking for overlaps
-	  and bit ranges. These can be very slow, so they are split out
-	  as a separate config, in case they need to be disabled.
-
-	  Note this config option will be replaced by the use of KUnit test
-	  attributes.
-
 config IS_SIGNED_TYPE_KUNIT_TEST
 	tristate "Test is_signed_type() macro" if !KUNIT_ALL_TESTS
 	depends on KUNIT
diff --git a/lib/memcpy_kunit.c b/lib/memcpy_kunit.c
index 30e00ef0bf2e..fd16e6ce53d1 100644
--- a/lib/memcpy_kunit.c
+++ b/lib/memcpy_kunit.c
@@ -309,9 +309,6 @@ static void set_random_nonzero(struct kunit *test, u8 *byte)
 
 static void init_large(struct kunit *test)
 {
-	if (!IS_ENABLED(CONFIG_MEMCPY_SLOW_KUNIT_TEST))
-		kunit_skip(test, "Slow test skipped. Enable with CONFIG_MEMCPY_SLOW_KUNIT_TEST=y");
-
 	/* Get many bit patterns. */
 	get_random_bytes(large_src, ARRAY_SIZE(large_src));