diff --git a/components/esp_hw_support/test/test_psram.c b/components/esp_hw_support/test/test_psram.c
new file mode 100644
index 0000000000..c5f87a551d
--- /dev/null
+++ b/components/esp_hw_support/test/test_psram.c
@@ -0,0 +1,52 @@
+/*
+ * SPDX-FileCopyrightText: 2020-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+
+
+#include "sdkconfig.h"
+#include <sys/param.h>
+#include <string.h>
+#include "esp_log.h"
+#include "test_utils.h"
+#include "unity.h"
+#include "esp_heap_caps.h"
+
+#if CONFIG_SPIRAM
+#include "spiram.h"
+
+
+const static char *TAG = "PSRAM";
+
+#if CONFIG_SPIRAM_MODE_OCT
+#define TEST_ALLOC_SIZE    (4 * 1024 * 1024)
+#else
+#define TEST_ALLOC_SIZE    (1 * 1024 * 1024)
+#endif
+
+
+TEST_CASE("test psram heap allocable","[psram]")
+{
+    uint32_t *ext_buffer = (uint32_t *)heap_caps_calloc(TEST_ALLOC_SIZE, 1, MALLOC_CAP_SPIRAM);
+    TEST_ASSERT(ext_buffer);
+
+    uintptr_t start = (uintptr_t)ext_buffer;
+    uintptr_t end = (uintptr_t)ext_buffer + TEST_ALLOC_SIZE;
+    ESP_LOGI(TAG, "test ext buffer start addr is %x, end addr is %x", start, end);
+    TEST_ASSERT((start >= SOC_EXTRAM_DATA_LOW) && (end <= SOC_EXTRAM_DATA_HIGH));
+
+
+    for (int i = 0; i < TEST_ALLOC_SIZE / sizeof(uint32_t); i++) {
+        ext_buffer[i] = (i + 1) ^ 0xaaaaaaaa;
+    }
+
+    for (int i = 0; i < TEST_ALLOC_SIZE / sizeof(uint32_t); i++) {
+        TEST_ASSERT(ext_buffer[i] == ((i + 1) ^ 0xaaaaaaaa));
+    }
+
+    free(ext_buffer);
+}
+
+#endif  //#if CONFIG_SPIRAM