diff --git a/test/u8-rmax.cc b/test/u8-rmax.cc
new file mode 100644
index 0000000..ad915ad
--- /dev/null
+++ b/test/u8-rmax.cc
@@ -0,0 +1,118 @@
+// Copyright (c) Facebook, Inc. and its affiliates.
+// All rights reserved.
+//
+// Copyright 2019 Google LLC
+//
+// This source code is licensed under the BSD-style license found in the
+// LICENSE file in the root directory of this source tree.
+
+#include <cpuinfo.h>
+#include <gtest/gtest.h>
+
+#include <xnnpack/isa-checks.h>
+#include <xnnpack/rmax.h>
+
+#include "rmax-microkernel-tester.h"
+
+
+#if CPUINFO_ARCH_ARM || CPUINFO_ARCH_ARM64
+  TEST(U8RMAX__NEON, n_lt_16) {
+    TEST_REQUIRES_ARM_NEON;
+    for (size_t n = 1; n < 16; n++) {
+      RMaxMicrokernelTester()
+        .n(n)
+        .Test(xnn_u8_rmax_ukernel__neon);
+    }
+  }
+
+  TEST(U8RMAX__NEON, n_eq_16) {
+    TEST_REQUIRES_ARM_NEON;
+    RMaxMicrokernelTester()
+      .n(16)
+      .Test(xnn_u8_rmax_ukernel__neon);
+  }
+
+  TEST(U8RMAX__NEON, n_div_16) {
+    TEST_REQUIRES_ARM_NEON;
+    for (size_t n = 16; n < 128; n += 16) {
+      RMaxMicrokernelTester()
+        .n(n)
+        .Test(xnn_u8_rmax_ukernel__neon);
+    }
+  }
+
+  TEST(U8RMAX__NEON, n_gt_16) {
+    TEST_REQUIRES_ARM_NEON;
+    for (size_t n = 16; n < 32; n++) {
+      RMaxMicrokernelTester()
+        .n(n)
+        .Test(xnn_u8_rmax_ukernel__neon);
+    }
+  }
+#endif  // CPUINFO_ARCH_ARM || CPUINFO_ARCH_ARM64
+
+#if CPUINFO_ARCH_X86 || CPUINFO_ARCH_X86_64
+  TEST(U8RMAX__SSE2, n_lt_16) {
+    TEST_REQUIRES_X86_SSE2;
+    for (size_t n = 1; n < 16; n++) {
+      RMaxMicrokernelTester()
+        .n(n)
+        .Test(xnn_u8_rmax_ukernel__sse2);
+    }
+  }
+
+  TEST(U8RMAX__SSE2, n_eq_16) {
+    TEST_REQUIRES_X86_SSE2;
+    RMaxMicrokernelTester()
+      .n(16)
+      .Test(xnn_u8_rmax_ukernel__sse2);
+  }
+
+  TEST(U8RMAX__SSE2, n_div_16) {
+    TEST_REQUIRES_X86_SSE2;
+    for (size_t n = 16; n < 128; n += 16) {
+      RMaxMicrokernelTester()
+        .n(n)
+        .Test(xnn_u8_rmax_ukernel__sse2);
+    }
+  }
+
+  TEST(U8RMAX__SSE2, n_gt_16) {
+    TEST_REQUIRES_X86_SSE2;
+    for (size_t n = 17; n < 32; n++) {
+      RMaxMicrokernelTester()
+        .n(n)
+        .Test(xnn_u8_rmax_ukernel__sse2);
+    }
+  }
+#endif  // CPUINFO_ARCH_X86 || CPUINFO_ARCH_X86_64
+
+TEST(U8RMAX__SCALAR, n_lt_2) {
+  for (size_t n = 1; n < 2; n++) {
+    RMaxMicrokernelTester()
+      .n(n)
+      .Test(xnn_u8_rmax_ukernel__scalar);
+  }
+}
+
+TEST(U8RMAX__SCALAR, n_eq_2) {
+  RMaxMicrokernelTester()
+    .n(2)
+    .Test(xnn_u8_rmax_ukernel__scalar);
+}
+
+TEST(U8RMAX__SCALAR, n_div_2) {
+  for (size_t n = 2; n < 16; n += 2) {
+    RMaxMicrokernelTester()
+      .n(n)
+      .Test(xnn_u8_rmax_ukernel__scalar);
+  }
+}
+
+TEST(U8RMAX__SCALAR, n_gt_2) {
+  for (size_t n = 3; n < 4; n++) {
+    RMaxMicrokernelTester()
+      .n(n)
+      .Test(xnn_u8_rmax_ukernel__scalar);
+  }
+}