diff --git a/tests/suites/test_suite_aes.function b/tests/suites/test_suite_aes.function
index 0c321cd..5ab265a 100644
--- a/tests/suites/test_suite_aes.function
+++ b/tests/suites/test_suite_aes.function
@@ -464,7 +464,7 @@
 void aes_ecb_copy_context( data_t * key_str, data_t * src_str )
 {
     unsigned char output1[16], output2[16], plain[16];
-    mbedtls_aes_context ctx1, ctx2;
+    mbedtls_aes_context ctx1, ctx2, ctx3;
 
     // Set key and encrypt with original context
     mbedtls_aes_init( &ctx1 );
@@ -474,18 +474,19 @@
                                         src_str->x, output1 ) == 0 );
 
     ctx2 = ctx1;
+    TEST_ASSERT( mbedtls_aes_setkey_dec( &ctx1, key_str->x,
+                                         key_str->len * 8 ) == 0 );
+    ctx3 = ctx1;
     memset( &ctx1, 0, sizeof( ctx1 ) );
 
-    // Encrypt with copied context and decrypt
+    // Encrypt and decrypt with copied context
     TEST_ASSERT( mbedtls_aes_crypt_ecb( &ctx2, MBEDTLS_AES_ENCRYPT,
                                         src_str->x, output2 ) == 0 );
-    TEST_ASSERT( mbedtls_aes_setkey_dec( &ctx2, key_str->x,
-                                         key_str->len * 8) == 0 );
-    TEST_ASSERT( mbedtls_aes_crypt_ecb( &ctx2, MBEDTLS_AES_DECRYPT,
+    TEST_ASSERT( mbedtls_aes_crypt_ecb( &ctx3, MBEDTLS_AES_DECRYPT,
                                         output1, plain ) == 0 );
 
     TEST_ASSERT( mbedtls_test_hexcmp( output1, output2, 16, 16 ) == 0 );
-    TEST_ASSERT( mbedtls_test_hexcmp( src_str->x, plain, src_str->len, 16) == 0 );
+    TEST_ASSERT( mbedtls_test_hexcmp( src_str->x, plain, src_str->len, 16 ) == 0 );
 }
 /* END_CASE */