diff --git a/tests/api.c b/tests/api.c
index 9200108fb..fccdd650f 100644
--- a/tests/api.c
+++ b/tests/api.c
@@ -33346,6 +33346,10 @@ static void test_wolfSSL_EVP_PKEY_sign(void)
     SHA256_Init(&c);
     SHA256_Update(&c, in, inlen);
     SHA256_Final(hash, &c);
+#ifdef WOLFSSL_SMALL_STACK_CACHE
+    /* workaround for small stack cache case */
+    wc_Sha256Free((wc_Sha256*)&c);
+#endif
 
     AssertNotNull(rsa = RSA_generate_key(2048, 3, NULL, NULL));
     AssertNotNull(pkey = wolfSSL_EVP_PKEY_new());
@@ -35759,6 +35763,10 @@ static void test_wolfSSL_RSA_verify()
     SHA256_Init(&c);
     SHA256_Update(&c, text, strlen(text));
     SHA256_Final(hash, &c);
+#ifdef WOLFSSL_SMALL_STACK_CACHE
+    /* workaround for small stack cache case */
+    wc_Sha256Free((wc_Sha256*)&c);
+#endif
 
     /* read privete key file */
     fp = XFOPEN(svrKeyFile, "r");
diff --git a/tests/hash.c b/tests/hash.c
index be9966ac5..c99eb2908 100644
--- a/tests/hash.c
+++ b/tests/hash.c
@@ -320,6 +320,7 @@ int md5_test(void)
         if (XMEMCMP(hash, test_md5[i].output, WC_MD5_DIGEST_SIZE) != 0)
             return -5 - i;
     }
+    wc_Md5Free(&md5);
 
     return 0;
 }
@@ -380,6 +381,7 @@ int sha_test(void)
         if (XMEMCMP(hash, test_sha[i].output, WC_SHA_DIGEST_SIZE) != 0)
             return -10 - i;
     }
+    wc_ShaFree(&sha);
 
     return 0;
 }
@@ -426,6 +428,7 @@ int sha224_test(void)
         if (XMEMCMP(hash, test_sha[i].output, WC_SHA224_DIGEST_SIZE) != 0)
             return -10 - i;
     }
+    wc_Sha224Free(&sha);
 
     return 0;
 }
@@ -475,6 +478,7 @@ int sha256_test(void)
         if (XMEMCMP(hash, test_sha[i].output, WC_SHA256_DIGEST_SIZE) != 0)
             return -10 - i;
     }
+    wc_Sha256Free(&sha);
 
     return 0;
 }
@@ -529,6 +533,7 @@ int sha512_test(void)
         if (XMEMCMP(hash, test_sha[i].output, WC_SHA512_DIGEST_SIZE) != 0)
             return -10 - i;
     }
+    wc_Sha512Free(&sha);
 
     return 0;
 }
@@ -581,6 +586,7 @@ int sha384_test(void)
         if (XMEMCMP(hash, test_sha[i].output, WC_SHA384_DIGEST_SIZE) != 0)
             return -10 - i;
     }
+    wc_Sha384Free(&sha);
 
     return 0;
 }