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diff --git a/testsuites/validation/tr-tq-flush-priority.c b/testsuites/validation/tr-tq-flush-priority.c
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+++ b/testsuites/validation/tr-tq-flush-priority.c
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+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/**
+ * @file
+ *
+ * @ingroup ScoreTqReqFlushPriority
+ */
+
+/*
+ * Copyright (C) 2021 embedded brains GmbH & Co. KG
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * This file is part of the RTEMS quality process and was automatically
+ * generated.  If you find something that needs to be fixed or
+ * worded better please post a report or patch to an RTEMS mailing list
+ * or raise a bug report:
+ *
+ * https://www.rtems.org/bugs.html
+ *
+ * For information on updating and regenerating please refer to the How-To
+ * section in the Software Requirements Engineering chapter of the
+ * RTEMS Software Engineering manual.  The manual is provided as a part of
+ * a release.  For development sources please refer to the online
+ * documentation at:
+ *
+ * https://docs.rtems.org
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "tr-tq-flush-priority.h"
+#include "tx-support.h"
+
+#include <rtems/test.h>
+
+/**
+ * @defgroup ScoreTqReqFlushPriority spec:/score/tq/req/flush-priority
+ *
+ * @ingroup TestsuitesValidationNoClock0
+ *
+ * @{
+ */
+
+typedef struct {
+  uint8_t Skip : 1;
+  uint8_t Pre_Queue_NA : 1;
+  uint8_t Post_Operation : 2;
+} ScoreTqReqFlushPriority_Entry;
+
+/**
+ * @brief Test context for spec:/score/tq/req/flush-priority test case.
+ */
+typedef struct {
+  /**
+   * @brief This member contains the call within ISR request.
+   */
+  CallWithinISRRequest request;
+
+  /**
+   * @brief This member contains a copy of the corresponding
+   *   ScoreTqReqFlushPriority_Run() parameter.
+   */
+  TQContext *tq_ctx;
+
+  /**
+   * @brief This member contains a copy of the corresponding
+   *   ScoreTqReqFlushPriority_Run() parameter.
+   */
+  bool supports_multiple_priority_queues;
+
+  struct {
+    /**
+     * @brief This member defines the pre-condition states for the next action.
+     */
+    size_t pcs[ 1 ];
+
+    /**
+     * @brief If this member is true, then the test action loop is executed.
+     */
+    bool in_action_loop;
+
+    /**
+     * @brief This member contains the next transition map index.
+     */
+    size_t index;
+
+    /**
+     * @brief This member contains the current transition map entry.
+     */
+    ScoreTqReqFlushPriority_Entry entry;
+
+    /**
+     * @brief If this member is true, then the current transition variant
+     *   should be skipped.
+     */
+    bool skip;
+  } Map;
+} ScoreTqReqFlushPriority_Context;
+
+static ScoreTqReqFlushPriority_Context
+  ScoreTqReqFlushPriority_Instance;
+
+static const char * const ScoreTqReqFlushPriority_PreDesc_Queue[] = {
+  "Empty",
+  "NonEmpty",
+  "NA"
+};
+
+static const char * const * const ScoreTqReqFlushPriority_PreDesc[] = {
+  ScoreTqReqFlushPriority_PreDesc_Queue,
+  NULL
+};
+
+typedef ScoreTqReqFlushPriority_Context Context;
+
+static const T_scheduler_event *GetUnblock( Context *ctx, size_t *index )
+{
+  return TQGetNextUnblock( ctx->tq_ctx, index );
+}
+
+static const rtems_tcb *GetTCB( Context *ctx, TQWorkerKind worker )
+{
+  return ctx->tq_ctx->worker_tcb[ worker ];
+}
+
+static void Flush( void *arg )
+{
+  Context *ctx;
+
+  ctx = arg;
+  TQSchedulerRecordStart( ctx->tq_ctx );
+  TQFlush( ctx->tq_ctx, true );
+}
+
+static void SchedulerEvent(
+  void                    *arg,
+  const T_scheduler_event *event,
+  T_scheduler_when         when
+)
+{
+  Context *ctx;
+
+  ctx = arg;
+
+  if (
+    when == T_SCHEDULER_BEFORE &&
+    event->operation == T_SCHEDULER_BLOCK
+  ) {
+    ctx->request.handler = Flush;
+    ctx->request.arg = ctx;
+    CallWithinISRSubmit( &ctx->request );
+    T_scheduler_set_event_handler( NULL, NULL );
+  }
+}
+
+static void ScoreTqReqFlushPriority_Pre_Queue_Prepare(
+  ScoreTqReqFlushPriority_Context  *ctx,
+  ScoreTqReqFlushPriority_Pre_Queue state
+)
+{
+  switch ( state ) {
+    case ScoreTqReqFlushPriority_Pre_Queue_Empty: {
+      /*
+       * While the thread queue is empty.
+       */
+      ctx->tq_ctx->how_many = 0;
+      break;
+    }
+
+    case ScoreTqReqFlushPriority_Pre_Queue_NonEmpty: {
+      /*
+       * While the thread queue has at least one enqueued thread.
+       */
+      ctx->tq_ctx->how_many = 3;
+      break;
+    }
+
+    case ScoreTqReqFlushPriority_Pre_Queue_NA:
+      break;
+  }
+}
+
+static void ScoreTqReqFlushPriority_Post_Operation_Check(
+  ScoreTqReqFlushPriority_Context       *ctx,
+  ScoreTqReqFlushPriority_Post_Operation state
+)
+{
+  size_t                   i;
+  const T_scheduler_event *event;
+
+  i = 0;
+
+  switch ( state ) {
+    case ScoreTqReqFlushPriority_Post_Operation_Nop: {
+      /*
+       * No operation shall be performed.
+       */
+      /* Event receive */
+      T_eq_ptr( GetUnblock( ctx, &i )->thread, GetTCB( ctx, TQ_BLOCKER_A ) );
+      T_eq_ptr( GetUnblock( ctx, &i ), &T_scheduler_event_null );
+      break;
+    }
+
+    case ScoreTqReqFlushPriority_Post_Operation_TryExtract: {
+      /*
+       * The enqueued threads of the thread queue may be extracted in priority
+       * order for each priority queue associated with a scheduler.  The
+       * priority queues of the thread queue shall be accessed in FIFO order.
+       */
+      event = GetUnblock( ctx, &i );
+      T_eq_ptr( event->executing, NULL );
+      T_eq_ptr( event->thread, GetTCB( ctx, TQ_BLOCKER_D ) );
+
+      event = GetUnblock( ctx, &i );
+      T_eq_ptr( event->executing, NULL );
+      T_eq_ptr( event->thread, GetTCB( ctx, TQ_BLOCKER_C ) );
+
+      event = GetUnblock( ctx, &i );
+      T_eq_ptr( event->executing, GetTCB( ctx, TQ_BLOCKER_B ) );
+      T_eq_ptr( event->thread, GetTCB( ctx, TQ_BLOCKER_B ) );
+
+      T_eq_ptr( GetUnblock( ctx, &i ), &T_scheduler_event_null );
+      break;
+    }
+
+    case ScoreTqReqFlushPriority_Post_Operation_NA:
+      break;
+  }
+}
+
+static void ScoreTqReqFlushPriority_Setup(
+  ScoreTqReqFlushPriority_Context *ctx
+)
+{
+  TQReset( ctx->tq_ctx );
+  TQSetPriority( ctx->tq_ctx, TQ_BLOCKER_A, PRIO_ULTRA_HIGH );
+
+  if (
+    ctx->supports_multiple_priority_queues &&
+    rtems_configuration_get_maximum_processors() > 1
+  ) {
+    TQSetScheduler( ctx->tq_ctx, TQ_BLOCKER_B, SCHEDULER_B_ID, PRIO_HIGH );
+  } else {
+    TQSetPriority( ctx->tq_ctx, TQ_BLOCKER_B, PRIO_HIGH );
+  }
+
+  TQSetPriority( ctx->tq_ctx, TQ_BLOCKER_C, PRIO_VERY_HIGH );
+  TQSetPriority( ctx->tq_ctx, TQ_BLOCKER_D, PRIO_ULTRA_HIGH );
+}
+
+static void ScoreTqReqFlushPriority_Setup_Wrap( void *arg )
+{
+  ScoreTqReqFlushPriority_Context *ctx;
+
+  ctx = arg;
+  ctx->Map.in_action_loop = false;
+  ScoreTqReqFlushPriority_Setup( ctx );
+}
+
+static void ScoreTqReqFlushPriority_Teardown(
+  ScoreTqReqFlushPriority_Context *ctx
+)
+{
+  TQReset( ctx->tq_ctx );
+}
+
+static void ScoreTqReqFlushPriority_Teardown_Wrap( void *arg )
+{
+  ScoreTqReqFlushPriority_Context *ctx;
+
+  ctx = arg;
+  ctx->Map.in_action_loop = false;
+  ScoreTqReqFlushPriority_Teardown( ctx );
+}
+
+static void ScoreTqReqFlushPriority_Action(
+  ScoreTqReqFlushPriority_Context *ctx
+)
+{
+  TQSend( ctx->tq_ctx, TQ_BLOCKER_A, TQ_EVENT_ENQUEUE_PREPARE );
+
+  if ( ctx->tq_ctx->how_many > 0 ) {
+    TQSend( ctx->tq_ctx, TQ_BLOCKER_C, TQ_EVENT_ENQUEUE );
+    TQSend( ctx->tq_ctx, TQ_BLOCKER_D, TQ_EVENT_ENQUEUE );
+    T_scheduler_set_event_handler( SchedulerEvent, ctx );
+    TQSendAndWaitForExecutionStop(
+      ctx->tq_ctx,
+      TQ_BLOCKER_B,
+      TQ_EVENT_ENQUEUE
+    );
+  } else {
+    TQSchedulerRecordStart( ctx->tq_ctx );
+    TQSend( ctx->tq_ctx, TQ_BLOCKER_A, TQ_EVENT_FLUSH_ALL );
+  }
+
+  TQSchedulerRecordStop( ctx->tq_ctx );
+  TQSend( ctx->tq_ctx, TQ_BLOCKER_A, TQ_EVENT_ENQUEUE_DONE );
+}
+
+static const ScoreTqReqFlushPriority_Entry
+ScoreTqReqFlushPriority_Entries[] = {
+  { 0, 0, ScoreTqReqFlushPriority_Post_Operation_Nop },
+  { 0, 0, ScoreTqReqFlushPriority_Post_Operation_TryExtract }
+};
+
+static const uint8_t
+ScoreTqReqFlushPriority_Map[] = {
+  0, 1
+};
+
+static size_t ScoreTqReqFlushPriority_Scope( void *arg, char *buf, size_t n )
+{
+  ScoreTqReqFlushPriority_Context *ctx;
+
+  ctx = arg;
+
+  if ( ctx->Map.in_action_loop ) {
+    return T_get_scope(
+      ScoreTqReqFlushPriority_PreDesc,
+      buf,
+      n,
+      ctx->Map.pcs
+    );
+  }
+
+  return 0;
+}
+
+static T_fixture ScoreTqReqFlushPriority_Fixture = {
+  .setup = ScoreTqReqFlushPriority_Setup_Wrap,
+  .stop = NULL,
+  .teardown = ScoreTqReqFlushPriority_Teardown_Wrap,
+  .scope = ScoreTqReqFlushPriority_Scope,
+  .initial_context = &ScoreTqReqFlushPriority_Instance
+};
+
+static inline ScoreTqReqFlushPriority_Entry ScoreTqReqFlushPriority_PopEntry(
+  ScoreTqReqFlushPriority_Context *ctx
+)
+{
+  size_t index;
+
+  index = ctx->Map.index;
+  ctx->Map.index = index + 1;
+  return ScoreTqReqFlushPriority_Entries[
+    ScoreTqReqFlushPriority_Map[ index ]
+  ];
+}
+
+static void ScoreTqReqFlushPriority_TestVariant(
+  ScoreTqReqFlushPriority_Context *ctx
+)
+{
+  ScoreTqReqFlushPriority_Pre_Queue_Prepare( ctx, ctx->Map.pcs[ 0 ] );
+  ScoreTqReqFlushPriority_Action( ctx );
+  ScoreTqReqFlushPriority_Post_Operation_Check(
+    ctx,
+    ctx->Map.entry.Post_Operation
+  );
+}
+
+static T_fixture_node ScoreTqReqFlushPriority_Node;
+
+static T_remark ScoreTqReqFlushPriority_Remark = {
+  .next = NULL,
+  .remark = "ScoreTqReqFlushPriority"
+};
+
+void ScoreTqReqFlushPriority_Run(
+  TQContext *tq_ctx,
+  bool       supports_multiple_priority_queues
+)
+{
+  ScoreTqReqFlushPriority_Context *ctx;
+
+  ctx = &ScoreTqReqFlushPriority_Instance;
+  ctx->tq_ctx = tq_ctx;
+  ctx->supports_multiple_priority_queues = supports_multiple_priority_queues;
+
+  ctx = T_push_fixture(
+    &ScoreTqReqFlushPriority_Node,
+    &ScoreTqReqFlushPriority_Fixture
+  );
+  ctx->Map.in_action_loop = true;
+  ctx->Map.index = 0;
+
+  for (
+    ctx->Map.pcs[ 0 ] = ScoreTqReqFlushPriority_Pre_Queue_Empty;
+    ctx->Map.pcs[ 0 ] < ScoreTqReqFlushPriority_Pre_Queue_NA;
+    ++ctx->Map.pcs[ 0 ]
+  ) {
+    ctx->Map.entry = ScoreTqReqFlushPriority_PopEntry( ctx );
+    ScoreTqReqFlushPriority_TestVariant( ctx );
+  }
+
+  T_add_remark( &ScoreTqReqFlushPriority_Remark );
+  T_pop_fixture();
+}
+
+/** @} */