diff --git a/UNITTESTS/target_h/randLIB.h b/UNITTESTS/target_h/randLIB.h
deleted file mode 100644
index a621be3..0000000
--- a/UNITTESTS/target_h/randLIB.h
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
- * Copyright (c) 2017, Arm Limited and affiliates.
- * 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 FEATURES_CELLULAR_UNITTESTS_TARGET_H_RANDLIB_H_
-#define FEATURES_CELLULAR_UNITTESTS_TARGET_H_RANDLIB_H_
-
-#include <stdint.h>
-
-extern void randLIB_seed_random(void);
-
-uint16_t randLIB_get_random_in_range(uint16_t min, uint16_t max);
-
-
-#endif /* FEATURES_CELLULAR_UNITTESTS_TARGET_H_RANDLIB_H_ */
diff --git a/platform/tests/UNITTESTS/doubles/randLIB.h b/platform/tests/UNITTESTS/doubles/randLIB.h
new file mode 100644
index 0000000..a621be3
--- /dev/null
+++ b/platform/tests/UNITTESTS/doubles/randLIB.h
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2017, Arm Limited and affiliates.
+ * 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 FEATURES_CELLULAR_UNITTESTS_TARGET_H_RANDLIB_H_
+#define FEATURES_CELLULAR_UNITTESTS_TARGET_H_RANDLIB_H_
+
+#include <stdint.h>
+
+extern void randLIB_seed_random(void);
+
+uint16_t randLIB_get_random_in_range(uint16_t min, uint16_t max);
+
+
+#endif /* FEATURES_CELLULAR_UNITTESTS_TARGET_H_RANDLIB_H_ */