diff --git a/sw/device/silicon_creator/lib/drivers/BUILD b/sw/device/silicon_creator/lib/drivers/BUILD
index 42691ac..b6e938a 100644
--- a/sw/device/silicon_creator/lib/drivers/BUILD
+++ b/sw/device/silicon_creator/lib/drivers/BUILD
@@ -430,12 +430,12 @@
     deps = dual_inputs(
         device = [
             ":otp",
+            "//sw/device/lib/base:csr",
+            "//sw/device/lib/base:abs_mmio",
+            "//sw/device/lib/base:hardened",
             "//hw/ip/otp_ctrl/data:otp_ctrl_regs",
             "//hw/ip/rv_core_ibex/data:rv_core_ibex_regs",
             "//hw/top_earlgrey/sw/autogen:top_earlgrey",
-            "//sw/device/lib/base:abs_mmio",
-            "//sw/device/lib/base:csr",
-            "//sw/device/lib/base:hardened",
         ],
         host = [
             "//sw/device/lib/base/testing:global_mock",
@@ -449,6 +449,23 @@
     ),
 )
 
+cc_test(
+    name = "rnd_unittest",
+    srcs = ["rnd_unittest.cc"],
+    deps = [
+        dual_cc_device_library_of(":rnd"),
+        ":otp",
+        "//hw/ip/otp_ctrl/data:otp_ctrl_regs",
+        "//hw/ip/rv_core_ibex/data:rv_core_ibex_regs",
+        "//hw/top_earlgrey/sw/autogen:top_earlgrey",
+        "//sw/device/lib/base:abs_mmio",
+        "//sw/device/lib/base:csr",
+        "//sw/device/silicon_creator/lib/base:sec_mmio",
+        "//sw/device/silicon_creator/testing:mask_rom_test",
+        "@googletest//:gtest_main",
+    ],
+)
+
 opentitan_functest(
     name = "rnd_functest",
     srcs = ["rnd_functest.c"],
diff --git a/sw/device/silicon_creator/lib/drivers/rnd_unittest.cc b/sw/device/silicon_creator/lib/drivers/rnd_unittest.cc
new file mode 100644
index 0000000..0505439
--- /dev/null
+++ b/sw/device/silicon_creator/lib/drivers/rnd_unittest.cc
@@ -0,0 +1,56 @@
+// Copyright lowRISC contributors.
+// Licensed under the Apache License, Version 2.0, see LICENSE for details.
+// SPDX-License-Identifier: Apache-2.0
+
+#include "sw/device/silicon_creator/lib/drivers/rnd.h"
+
+#include "gtest/gtest.h"
+#include "sw/device/lib/base/csr.h"
+#include "sw/device/lib/base/testing/mock_abs_mmio.h"
+#include "sw/device/silicon_creator/lib/base/mock_csr.h"
+#include "sw/device/silicon_creator/lib/base/mock_sec_mmio.h"
+#include "sw/device/silicon_creator/lib/drivers/mock_otp.h"
+#include "sw/device/silicon_creator/testing/mask_rom_test.h"
+
+#include "hw/top_earlgrey/sw/autogen/top_earlgrey.h"
+#include "otp_ctrl_regs.h"
+#include "rv_core_ibex_regs.h"
+
+namespace rnd_unittest {
+namespace {
+using ::testing::Return;
+
+class RndTest : public mask_rom_test::MaskRomTest {
+ protected:
+  uint32_t base_ = TOP_EARLGREY_RV_CORE_IBEX_CFG_BASE_ADDR;
+
+  mask_rom_test::MockAbsMmio mmio_;
+  mask_rom_test::MockSecMmio sec_mmio_;
+  mask_rom_test::MockOtp otp_;
+  mock_csr::MockCsr csr_;
+};
+
+TEST_F(RndTest, GetUint32Disabled) {
+  EXPECT_CALL(otp_, read32(OTP_CTRL_PARAM_CREATOR_SW_CFG_RNG_EN_OFFSET))
+      .WillOnce(Return(kHardenedBoolTrue));
+
+  EXPECT_ABS_READ32(base_ + RV_CORE_IBEX_RND_STATUS_REG_OFFSET,
+                    {{RV_CORE_IBEX_RND_STATUS_RND_DATA_VALID_BIT, false}});
+  EXPECT_ABS_READ32(base_ + RV_CORE_IBEX_RND_STATUS_REG_OFFSET,
+                    {{RV_CORE_IBEX_RND_STATUS_RND_DATA_VALID_BIT, true}});
+  EXPECT_CSR_READ(CSR_REG_MCYCLE, 67894);
+  EXPECT_ABS_READ32(base_ + RV_CORE_IBEX_RND_DATA_REG_OFFSET, 12345);
+  EXPECT_EQ(rnd_uint32(), 67894 + 12345);
+}
+
+TEST_F(RndTest, GetUint32Enabled) {
+  EXPECT_CALL(otp_, read32(OTP_CTRL_PARAM_CREATOR_SW_CFG_RNG_EN_OFFSET))
+      .WillOnce(Return(kHardenedBoolFalse));
+
+  EXPECT_CSR_READ(CSR_REG_MCYCLE, 978465);
+  EXPECT_ABS_READ32(base_ + RV_CORE_IBEX_RND_DATA_REG_OFFSET, 193475837);
+  EXPECT_EQ(rnd_uint32(), 978465 + 193475837);
+}
+
+}  // namespace
+}  // namespace rnd_unittest