diff --git a/components/mbedtls/test/test_sha.c b/components/mbedtls/test/test_sha.c
index a40c70ee3d..be800a0993 100644
--- a/components/mbedtls/test/test_sha.c
+++ b/components/mbedtls/test/test_sha.c
@@ -128,6 +128,9 @@ TEST_CASE("Test esp_sha() function with long input", "[hw_crypto]")
     TEST_ASSERT_EQUAL(0, r);
 #endif
 
+    /* munmap() 1MB of flash when the usge of memory-mapped ptr is over */
+    spi_flash_munmap(handle);
+
     TEST_ASSERT_EQUAL_MEMORY_MESSAGE(sha1_espsha, sha1_mbedtls, sizeof(sha1_espsha), "SHA1 results should match");
 
     TEST_ASSERT_EQUAL_MEMORY_MESSAGE(sha256_espsha, sha256_mbedtls, sizeof(sha256_espsha), "SHA256 results should match");