diff --git "a/frameworks\\utest/source/shim.cpp" "b/frameworks\\utest/source/shim.cpp"
new file mode 100644
index 0000000000..bfb603cee8
--- /dev/null
+++ "b/frameworks\\utest/source/shim.cpp"
@@ -0,0 +1,125 @@
+/****************************************************************************
+ * Copyright (c) 2015, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ ****************************************************************************
+ */
+
+#include "utest/shim.h"
+
+
+#if UTEST_SHIM_SCHEDULER_USE_MINAR
+#include "minar/minar.h"
+
+static int32_t utest_minar_init()
+{
+    return 0;
+}
+static void *utest_minar_post(const utest_v1_harness_callback_t callback, const uint32_t delay_ms)
+{
+    void *handle = minar::Scheduler::postCallback(callback).delay(minar::milliseconds(delay_ms)).getHandle();
+    return handle;
+}
+static int32_t utest_minar_cancel(void *handle)
+{
+    int32_t ret = minar::Scheduler::cancelCallback(handle);
+    return ret;
+}
+static int32_t utest_minar_run()
+{
+    return 0;
+}
+extern "C" const utest_v1_scheduler_t utest_v1_scheduler =
+{
+    utest_minar_init,
+    utest_minar_post,
+    utest_minar_cancel,
+    utest_minar_run
+};
+
+#elif UTEST_SHIM_SCHEDULER_USE_US_TICKER
+// only one callback is active at any given time
+volatile utest_v1_harness_callback_t minimal_callback;
+volatile utest_v1_harness_callback_t ticker_callback;
+const ticker_data_t *ticker_data;
+ticker_event_t ticker_event;
+
+static void ticker_handler(uint32_t)
+{
+    // printf("\t\t>>> Ticker callback fired for %p.\n", ticker_callback);
+    minimal_callback = ticker_callback;
+}
+
+static int32_t utest_us_ticker_init()
+{
+    ticker_data = get_us_ticker_data();
+    return 0;
+}
+static void *utest_us_ticker_post(const utest_v1_harness_callback_t callback, const uint32_t delay_ms)
+{
+    // printf("\t\t>>> Schedule %p with %ums delay => %p.\n", callback, (unsigned int)delay_ms, (void*)1);
+    if (delay_ms) {
+        ticker_callback = callback;
+        // setup ticker to call the handler manually
+        ticker_set_handler(ticker_data, ticker_handler);
+        // fire the interrupt in 1000us * delay_ms
+        ticker_insert_event(ticker_data, &ticker_event, ticker_read(ticker_data) + delay_ms * 1000, 0);
+    } else {
+        minimal_callback = callback;
+    }
+
+    // return a bogus handle
+    return (void*)1;
+}
+static int32_t utest_us_ticker_cancel(void *handle)
+{
+    // printf("\t\t>>> Cancel %p => %u\n", handle, (unsigned int)0);
+    (void) handle;
+    ticker_remove_event(ticker_data, &ticker_event);
+    return 0;
+}
+static int32_t utest_us_ticker_run()
+{
+    while(1)
+    {
+        // check if a new callback has been set
+        if (minimal_callback)
+        {
+            // printf("\t\t>>> Firing callback %p\n", minimal_callback);
+            // copy the callback
+            utest_v1_harness_callback_t callback = minimal_callback;
+            // reset the shared callback
+            minimal_callback = NULL;
+            // execute the copied callback
+            callback();
+        }
+    }
+    return 0;
+}
+const utest_v1_scheduler_t utest_v1_scheduler =
+{
+    utest_us_ticker_init,
+    utest_us_ticker_post,
+    utest_us_ticker_cancel,
+    utest_us_ticker_run
+};
+#else
+const utest_v1_scheduler_t utest_v1_scheduler =
+{
+    NULL,
+    NULL,
+    NULL,
+    NULL
+};
+#endif
diff --git "a/frameworks\\utest/utest/shim.h" "b/frameworks\\utest/utest/shim.h"
new file mode 100644
index 0000000000..dd8f8437ca
--- /dev/null
+++ "b/frameworks\\utest/utest/shim.h"
@@ -0,0 +1,77 @@
+/****************************************************************************
+ * Copyright (c) 2016, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ ****************************************************************************
+ */
+
+#ifndef UTEST_SHIM_H
+#define UTEST_SHIM_H
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include "scheduler.h"
+
+#ifdef YOTTA_CFG
+#   include "compiler-polyfill/attributes.h"
+#else
+#   ifndef __deprecated_message
+#       if defined(__CC_ARM)
+#           define __deprecated_message(msg) __attribute__((deprecated))
+#       else
+#           define __deprecated_message(msg) __attribute__((deprecated(msg)))
+#       endif
+#   endif
+#endif
+
+#ifdef YOTTA_CORE_UTIL_VERSION_STRING
+#   include "core-util/CriticalSectionLock.h"
+#   define UTEST_ENTER_CRITICAL_SECTION mbed::util::CriticalSectionLock lock
+#   define UTEST_LEAVE_CRITICAL_SECTION
+#else
+#   ifndef UTEST_ENTER_CRITICAL_SECTION
+#       error "You must provide a UTEST_ENTER_CRITICAL_SECTION implementation!"
+#   endif
+#   ifndef UTEST_LEAVE_CRITICAL_SECTION
+#       error "You must provide a UTEST_LEAVE_CRITICAL_SECTION implementation!"
+#   endif
+#endif
+
+#ifndef YOTTA_CFG_UTEST_USE_CUSTOM_SCHEDULER
+#   ifdef YOTTA_MINAR_VERSION_STRING
+#       define UTEST_MINAR_AVAILABLE 1
+#   else
+#       define UTEST_MINAR_AVAILABLE 0
+#   endif
+#   ifndef UTEST_SHIM_SCHEDULER_USE_MINAR
+#       define UTEST_SHIM_SCHEDULER_USE_MINAR UTEST_MINAR_AVAILABLE
+#   endif
+#   ifndef UTEST_SHIM_SCHEDULER_USE_US_TICKER
+#       define UTEST_SHIM_SCHEDULER_USE_US_TICKER (!UTEST_MINAR_AVAILABLE)
+#   endif
+#endif  // YOTTA_CFG_UTEST_USE_CUSTOM_SCHEDULER
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/// This is the default scheduler implementation used by the harness.
+extern const utest_v1_scheduler_t utest_v1_scheduler;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // UTEST_SHIM_H