diff --git a/tests/suites/test_suite_mpi.data b/tests/suites/test_suite_mpi.data
index 821fd89ad..32eaec07f 100644
--- a/tests/suites/test_suite_mpi.data
+++ b/tests/suites/test_suite_mpi.data
@@ -164,37 +164,37 @@ Base test mbedtls_mpi_cmp_mpi (Mixed values) #6
 mbedtls_mpi_cmp_mpi:10:"-2":10:"31231231289798":-1
 
 Base test mbedtls_mpi_lt_mpi_ct #1
-mbedtls_mpi_lt_mpi_ct:1:10:"693":1:10:"693":0:0
+mbedtls_mpi_lt_mpi_ct:1:"2B5":1:"2B5":0:0
 
 Base test mbedtls_mpi_lt_mpi_ct #2
-mbedtls_mpi_lt_mpi_ct:1:10:"693":1:10:"692":0:0
+mbedtls_mpi_lt_mpi_ct:1:"2B5":1:"2B4":0:0
 
 Base test mbedtls_mpi_lt_mpi_ct #3
-mbedtls_mpi_lt_mpi_ct:1:10:"693":1:10:"694":1:0
+mbedtls_mpi_lt_mpi_ct:1:"2B5":1:"2B6":1:0
 
 Base test mbedtls_mpi_lt_mpi_ct (Negative values) #1
-mbedtls_mpi_lt_mpi_ct:1:10:"-2":1:10:"-2":0:0
+mbedtls_mpi_lt_mpi_ct:1:"-2":1:"-2":0:0
 
 Base test mbedtls_mpi_lt_mpi_ct (Negative values) #2
-mbedtls_mpi_lt_mpi_ct:1:10:"-2":1:10:"-3":0:0
+mbedtls_mpi_lt_mpi_ct:1:"-2":1:"-3":0:0
 
 Base test mbedtls_mpi_lt_mpi_ct (Negative values) #3
-mbedtls_mpi_lt_mpi_ct:1:10:"-2":1:10:"-1":1:0
+mbedtls_mpi_lt_mpi_ct:1:"-2":1:"-1":1:0
 
 Base test mbedtls_mpi_lt_mpi_ct (Mixed values) #4
-mbedtls_mpi_lt_mpi_ct:1:10:"-3":1:10:"2":1:0
+mbedtls_mpi_lt_mpi_ct:1:"-3":1:"2":1:0
 
 Base test mbedtls_mpi_lt_mpi_ct (Mixed values) #5
-mbedtls_mpi_lt_mpi_ct:1:10:"2":1:10:"-3":0:0
+mbedtls_mpi_lt_mpi_ct:1:"2":1:"-3":0:0
 
 Base test mbedtls_mpi_lt_mpi_ct (Mixed values) #6
-mbedtls_mpi_lt_mpi_ct:2:10:"-2":2:10:"31231231289798":1:0
+mbedtls_mpi_lt_mpi_ct:2:"-2":2:"1C67967269C6":1:0
 
 Base test mbedtls_mpi_lt_mpi_ct (X is longer in storage) #7
-mbedtls_mpi_lt_mpi_ct:3:10:"693":2:10:"693":0:MBEDTLS_ERR_MPI_BAD_INPUT_DATA
+mbedtls_mpi_lt_mpi_ct:3:"2B5":2:"2B5":0:MBEDTLS_ERR_MPI_BAD_INPUT_DATA
 
 Base test mbedtls_mpi_lt_mpi_ct (Y is longer in storage) #8
-mbedtls_mpi_lt_mpi_ct:3:10:"693":4:10:"693":0:MBEDTLS_ERR_MPI_BAD_INPUT_DATA
+mbedtls_mpi_lt_mpi_ct:3:"2B5":4:"2B5":0:MBEDTLS_ERR_MPI_BAD_INPUT_DATA
 
 Base test mbedtls_mpi_cmp_abs #1
 mbedtls_mpi_cmp_abs:10:"693":10:"693":0
diff --git a/tests/suites/test_suite_mpi.function b/tests/suites/test_suite_mpi.function
index a0aa726a7..97c338b85 100644
--- a/tests/suites/test_suite_mpi.function
+++ b/tests/suites/test_suite_mpi.function
@@ -538,8 +538,8 @@ exit:
 /* END_CASE */
 
 /* BEGIN_CASE */
-void mbedtls_mpi_lt_mpi_ct( int size_X, int radix_X, char * input_X,
-                            int size_Y, int radix_Y, char * input_Y,
+void mbedtls_mpi_lt_mpi_ct( int size_X, char * input_X,
+                            int size_Y, char * input_Y,
                             int input_ret, int input_err )
 {
     unsigned ret;
@@ -547,8 +547,8 @@ void mbedtls_mpi_lt_mpi_ct( int size_X, int radix_X, char * input_X,
     mbedtls_mpi X, Y;
     mbedtls_mpi_init( &X ); mbedtls_mpi_init( &Y );
 
-    TEST_ASSERT( mbedtls_mpi_read_string( &X, radix_X, input_X ) == 0 );
-    TEST_ASSERT( mbedtls_mpi_read_string( &Y, radix_Y, input_Y ) == 0 );
+    TEST_ASSERT( mbedtls_mpi_read_string( &X, 16, input_X ) == 0 );
+    TEST_ASSERT( mbedtls_mpi_read_string( &Y, 16, input_Y ) == 0 );
 
     mbedtls_mpi_grow( &X, size_X );
     mbedtls_mpi_grow( &Y, size_Y );