diff --git a/Tests/Kernel/TestKernelUnveil.cpp b/Tests/Kernel/TestKernelUnveil.cpp
index 884bf18314..04d6d9a737 100644
--- a/Tests/Kernel/TestKernelUnveil.cpp
+++ b/Tests/Kernel/TestKernelUnveil.cpp
@@ -5,8 +5,36 @@
  */
 
 #include <LibTest/TestCase.h>
+#include <errno.h>
 #include <unistd.h>
 
+TEST_CASE(test_argument_validation)
+{
+    auto res = unveil("/etc", "aaaaaaaaaaaa");
+    EXPECT_EQ(res, -1);
+    EXPECT_EQ(errno, EINVAL);
+
+    res = unveil(nullptr, "r");
+    EXPECT_EQ(res, -1);
+    EXPECT_EQ(errno, EINVAL);
+
+    res = unveil("/etc", nullptr);
+    EXPECT_EQ(res, -1);
+    EXPECT_EQ(errno, EINVAL);
+
+    res = unveil("", "r");
+    EXPECT_EQ(res, -1);
+    EXPECT_EQ(errno, EINVAL);
+
+    res = unveil("test", "r");
+    EXPECT_EQ(res, -1);
+    EXPECT_EQ(errno, EINVAL);
+
+    res = unveil("/etc", "f");
+    EXPECT_EQ(res, -1);
+    EXPECT_EQ(errno, EINVAL);
+}
+
 TEST_CASE(test_failures)
 {
     auto res = unveil("/etc", "r");