diff --git a/tests/suites/test_suite_ctr_drbg.function b/tests/suites/test_suite_ctr_drbg.function
index 5690675..b3790a2 100644
--- a/tests/suites/test_suite_ctr_drbg.function
+++ b/tests/suites/test_suite_ctr_drbg.function
@@ -45,6 +45,8 @@
     TEST_ASSERT( ctr_drbg_random_with_add( &ctx, buf, 16, add2, add2_len ) == 0 );
     hexify( output_str, buf, 16 );
     TEST_ASSERT( strcmp( (char *) output_str, result_str ) == 0 );
+
+    ctr_drbg_free( &ctx );
 }
 /* END_CASE */
 
@@ -79,6 +81,8 @@
     TEST_ASSERT( ctr_drbg_random_with_add( &ctx, buf, 16, add2, add2_len ) == 0 );
     hexify( output_str, buf, 16 );
     TEST_ASSERT( strcmp( (char *) output_str, result_str ) == 0 );
+
+    ctr_drbg_free( &ctx );
 }
 /* END_CASE */
 
@@ -150,6 +154,8 @@
     last_idx = test_offset_idx;
     TEST_ASSERT( ctr_drbg_random( &ctx, out, sizeof( out ) ) == 0 );
     TEST_ASSERT( test_offset_idx - last_idx == 13 );
+
+    ctr_drbg_free( &ctx );
 }
 /* END_CASE */
 
@@ -161,6 +167,8 @@
     TEST_ASSERT( ctr_drbg_init( &ctx, rnd_std_rand, NULL, NULL, 0 ) == 0 );
     TEST_ASSERT( ctr_drbg_write_seed_file( &ctx, path ) == ret );
     TEST_ASSERT( ctr_drbg_update_seed_file( &ctx, path ) == ret );
+
+    ctr_drbg_free( &ctx );
 }
 /* END_CASE */
 
diff --git a/tests/suites/test_suite_dhm.function b/tests/suites/test_suite_dhm.function
index b0df9fd..8c85517 100644
--- a/tests/suites/test_suite_dhm.function
+++ b/tests/suites/test_suite_dhm.function
@@ -25,8 +25,8 @@
     int x_size, i;
     rnd_pseudo_info rnd_info;
 
-    memset( &ctx_srv, 0x00, sizeof( dhm_context ) );
-    memset( &ctx_cli, 0x00, sizeof( dhm_context ) );
+    dhm_init( &ctx_srv );
+    dhm_init( &ctx_cli );
     memset( ske, 0x00, 1000 );
     memset( pub_cli, 0x00, 1000 );
     memset( sec_srv, 0x00, 1000 );
@@ -103,7 +103,7 @@
     dhm_context ctx;
     mpi P, G;
 
-    memset( &ctx, 0, sizeof ctx );
+    dhm_init( &ctx );
     mpi_init( &P ); mpi_init( &G );
 
     TEST_ASSERT( mpi_read_string( &P, 16, p ) == 0 );
diff --git a/tests/suites/test_suite_rsa.function b/tests/suites/test_suite_rsa.function
index a01b217..a762e04 100644
--- a/tests/suites/test_suite_rsa.function
+++ b/tests/suites/test_suite_rsa.function
@@ -597,6 +597,7 @@
     }
 
     rsa_free( &ctx );
+    ctr_drbg_free( &ctr_drbg );
     entropy_free( &entropy );
 }
 /* END_CASE */