diff --git a/tests/suites/test_suite_mpi.data b/tests/suites/test_suite_mpi.data
index c2de5a0..0a59c76 100644
--- a/tests/suites/test_suite_mpi.data
+++ b/tests/suites/test_suite_mpi.data
@@ -275,13 +275,82 @@
 mbedtls_mpi_cmp_abs:10:"-2":10:"1":1
 
 Copy zero (1 limb) to positive (1 limb)
-mbedtls_mpi_copy:0:1500
+mbedtls_mpi_copy_sint:0:1500
+
+Copy zero (1 limb) to negative (1 limb)
+mbedtls_mpi_copy_sint:0:-1500
+
+Copy positive (1 limb) to zero (1 limb)
+mbedtls_mpi_copy_sint:1500:0
+
+Copy negative (1 limb) to zero (1 limb)
+mbedtls_mpi_copy_sint:-1500:0
+
+Copy positive (1 limb) to negative (1 limb)
+mbedtls_mpi_copy_sint:1500:-42
+
+Copy negative (1 limb) to positive (1 limb)
+mbedtls_mpi_copy_sint:-42:1500
+
+Copy zero (null) to zero (null)
+mbedtls_mpi_copy_binary:"":""
+
+Copy zero (null) to positive (1 limb)
+mbedtls_mpi_copy_binary:"":"1234"
+
+Copy positive (1 limb) to zero (null)
+mbedtls_mpi_copy_binary:"1234":""
+
+Copy positive to larger
+mbedtls_mpi_copy_binary:"bead":"ca5cadedb01dfaceacc01ade"
+
+Copy positive to smaller
+mbedtls_mpi_copy_binary:"ca5cadedb01dfaceacc01ade":"bead"
 
 Copy self: positive (1 limb)
 mpi_copy_self:14
 
-Swap 0 with positive (1 limb)
-mbedtls_mpi_swap:0:1500
+Copy self: zero (1 limb)
+mpi_copy_self:0
+
+Swap zero (1 limb) with positive (1 limb)
+mbedtls_mpi_swap_sint:0:1500
+
+Swap zero (1 limb) with negative (1 limb)
+mbedtls_mpi_swap_sint:0:-1500
+
+Swap positive (1 limb) with zero (1 limb)
+mbedtls_mpi_swap_sint:1500:0
+
+Swap negative (1 limb) with zero (1 limb)
+mbedtls_mpi_swap_sint:-1500:0
+
+Swap positive (1 limb) with negative (1 limb)
+mbedtls_mpi_swap_sint:1500:-42
+
+Swap negative (1 limb) with positive (1 limb)
+mbedtls_mpi_swap_sint:-42:1500
+
+Swap zero (null) with zero (null)
+mbedtls_mpi_swap_binary:"":""
+
+Swap zero (null) with positive (1 limb)
+mbedtls_mpi_swap_binary:"":"1234"
+
+Swap positive (1 limb) with zero (null)
+mbedtls_mpi_swap_binary:"1234":""
+
+Swap positive with larger
+mbedtls_mpi_swap_binary:"bead":"ca5cadedb01dfaceacc01ade"
+
+Swap positive with smaller
+mbedtls_mpi_swap_binary:"ca5cadedb01dfaceacc01ade":"bead"
+
+Swap self: 1 limb
+mpi_swap_self:"face"
+
+Swap self: null
+mpi_swap_self:""
 
 Shrink 2 in 2 to 4
 mbedtls_mpi_shrink:2:2:4:4
diff --git a/tests/suites/test_suite_mpi.function b/tests/suites/test_suite_mpi.function
index f63f2e6..6f5abf3 100644
--- a/tests/suites/test_suite_mpi.function
+++ b/tests/suites/test_suite_mpi.function
@@ -374,22 +374,40 @@
 /* END_CASE */
 
 /* BEGIN_CASE */
-void mbedtls_mpi_copy( int input_X, int input_A )
+void mbedtls_mpi_copy_sint( int input_X, int input_Y )
 {
-    mbedtls_mpi X, Y, A;
-    mbedtls_mpi_init( &X ); mbedtls_mpi_init( &Y ); mbedtls_mpi_init( &A );
+    mbedtls_mpi X, Y;
+    mbedtls_mpi_init( &X ); mbedtls_mpi_init( &Y );
 
     TEST_ASSERT( mbedtls_mpi_lset( &X, input_X ) == 0 );
-    TEST_ASSERT( mbedtls_mpi_lset( &Y, input_A ) == 0 );
-    TEST_ASSERT( mbedtls_mpi_lset( &A, input_A ) == 0 );
-    TEST_ASSERT( mbedtls_mpi_cmp_mpi( &X, &Y ) != 0 );
-    TEST_ASSERT( mbedtls_mpi_cmp_mpi( &Y, &A ) == 0 );
+    TEST_ASSERT( mbedtls_mpi_lset( &Y, input_Y ) == 0 );
+
     TEST_ASSERT( mbedtls_mpi_copy( &Y, &X ) == 0 );
-    TEST_ASSERT( mbedtls_mpi_cmp_mpi( &X, &Y ) == 0 );
-    TEST_ASSERT( mbedtls_mpi_cmp_mpi( &Y, &A ) != 0 );
+    TEST_ASSERT( mbedtls_mpi_cmp_int( &X, input_X ) == 0 );
+    TEST_ASSERT( mbedtls_mpi_cmp_int( &Y, input_X ) == 0 );
 
 exit:
-    mbedtls_mpi_free( &X ); mbedtls_mpi_free( &Y ); mbedtls_mpi_free( &A );
+    mbedtls_mpi_free( &X ); mbedtls_mpi_free( &Y );
+}
+/* END_CASE */
+
+/* BEGIN_CASE */
+void mbedtls_mpi_copy_binary( char *input_X, char *input_Y )
+{
+    mbedtls_mpi X, Y, X0;
+    mbedtls_mpi_init( &X ); mbedtls_mpi_init( &Y ); mbedtls_mpi_init( &X0 );
+
+    TEST_ASSERT( mbedtls_mpi_read_string( &X, 16, input_X ) == 0 );
+    TEST_ASSERT( mbedtls_mpi_read_string( &Y, 16, input_Y ) == 0 );
+    TEST_ASSERT( mbedtls_mpi_read_string( &X0, 16, input_X ) == 0 );
+    TEST_ASSERT( mbedtls_mpi_cmp_mpi( &X, &X0 ) == 0 );
+
+    TEST_ASSERT( mbedtls_mpi_copy( &Y, &X ) == 0 );
+    TEST_ASSERT( mbedtls_mpi_cmp_mpi( &X, &X0 ) == 0 );
+    TEST_ASSERT( mbedtls_mpi_cmp_mpi( &Y, &X0 ) == 0 );
+
+exit:
+    mbedtls_mpi_free( &X ); mbedtls_mpi_free( &Y ); mbedtls_mpi_free( &X0 );
 }
 /* END_CASE */
 
@@ -481,22 +499,61 @@
 /* END_CASE */
 
 /* BEGIN_CASE */
-void mbedtls_mpi_swap( int input_X,  int input_Y )
+void mbedtls_mpi_swap_sint( int input_X, int input_Y )
 {
-    mbedtls_mpi X, Y, A;
-    mbedtls_mpi_init( &X ); mbedtls_mpi_init( &Y ); mbedtls_mpi_init( &A );
+    mbedtls_mpi X, Y;
+    mbedtls_mpi_init( &X ); mbedtls_mpi_init( &Y );
 
     TEST_ASSERT( mbedtls_mpi_lset( &X, input_X ) == 0 );
     TEST_ASSERT( mbedtls_mpi_lset( &Y, input_Y ) == 0 );
-    TEST_ASSERT( mbedtls_mpi_lset( &A, input_X ) == 0 );
-    TEST_ASSERT( mbedtls_mpi_cmp_mpi( &X, &Y ) != 0 );
-    TEST_ASSERT( mbedtls_mpi_cmp_mpi( &X, &A ) == 0 );
+    TEST_ASSERT( mbedtls_mpi_cmp_int( &X, input_X ) == 0 );
+    TEST_ASSERT( mbedtls_mpi_cmp_int( &Y, input_Y ) == 0 );
+
     mbedtls_mpi_swap( &X, &Y );
-    TEST_ASSERT( mbedtls_mpi_cmp_mpi( &X, &Y ) != 0 );
-    TEST_ASSERT( mbedtls_mpi_cmp_mpi( &Y, &A ) == 0 );
+    TEST_ASSERT( mbedtls_mpi_cmp_int( &X, input_Y ) == 0 );
+    TEST_ASSERT( mbedtls_mpi_cmp_int( &Y, input_X ) == 0 );
 
 exit:
-    mbedtls_mpi_free( &X ); mbedtls_mpi_free( &Y ); mbedtls_mpi_free( &A );
+    mbedtls_mpi_free( &X ); mbedtls_mpi_free( &Y );
+}
+/* END_CASE */
+
+/* BEGIN_CASE */
+void mbedtls_mpi_swap_binary( char *input_X, char *input_Y )
+{
+    mbedtls_mpi X, Y, X0, Y0;
+    mbedtls_mpi_init( &X ); mbedtls_mpi_init( &Y );
+    mbedtls_mpi_init( &X0 ); mbedtls_mpi_init( &Y0 );
+
+    TEST_ASSERT( mbedtls_mpi_read_string( &X, 16, input_X ) == 0 );
+    TEST_ASSERT( mbedtls_mpi_read_string( &Y, 16, input_Y ) == 0 );
+    TEST_ASSERT( mbedtls_mpi_read_string( &X0, 16, input_X ) == 0 );
+    TEST_ASSERT( mbedtls_mpi_read_string( &Y0, 16, input_Y ) == 0 );
+
+    mbedtls_mpi_swap( &X, &Y );
+    TEST_ASSERT( mbedtls_mpi_cmp_mpi( &X, &Y0 ) == 0 );
+    TEST_ASSERT( mbedtls_mpi_cmp_mpi( &Y, &X0 ) == 0 );
+
+exit:
+    mbedtls_mpi_free( &X ); mbedtls_mpi_free( &Y );
+    mbedtls_mpi_free( &X0 ); mbedtls_mpi_free( &Y0 );
+}
+/* END_CASE */
+
+/* BEGIN_CASE */
+void mpi_swap_self( char *input_X )
+{
+    mbedtls_mpi X, X0;
+    mbedtls_mpi_init( &X ); mbedtls_mpi_init( &X0 );
+
+    TEST_ASSERT( mbedtls_mpi_read_string( &X, 16, input_X ) == 0 );
+    TEST_ASSERT( mbedtls_mpi_read_string( &X0, 16, input_X ) == 0 );
+
+    mbedtls_mpi_swap( &X, &X );
+    TEST_ASSERT( mbedtls_mpi_cmp_mpi( &X, &X0 ) == 0 );
+
+exit:
+    mbedtls_mpi_free( &X ); mbedtls_mpi_free( &X0 );
 }
 /* END_CASE */