diff --git a/tests/src/random.c b/tests/src/random.c
index 7f3f401..e74e689 100644
--- a/tests/src/random.c
+++ b/tests/src/random.c
@@ -37,109 +37,111 @@
 
 #include <mbedtls/entropy.h>
 
-int mbedtls_test_rnd_std_rand( void *rng_state,
-                               unsigned char *output,
-                               size_t len )
+int mbedtls_test_rnd_std_rand(void *rng_state,
+                              unsigned char *output,
+                              size_t len)
 {
 #if !defined(__OpenBSD__) && !defined(__NetBSD__)
     size_t i;
 
-    if( rng_state != NULL )
+    if (rng_state != NULL) {
         rng_state  = NULL;
+    }
 
-    for( i = 0; i < len; ++i )
+    for (i = 0; i < len; ++i) {
         output[i] = rand();
+    }
 #else
-    if( rng_state != NULL )
+    if (rng_state != NULL) {
         rng_state = NULL;
+    }
 
-    arc4random_buf( output, len );
+    arc4random_buf(output, len);
 #endif /* !OpenBSD && !NetBSD */
 
-    return( 0 );
+    return 0;
 }
 
-int mbedtls_test_rnd_zero_rand( void *rng_state,
-                                unsigned char *output,
-                                size_t len )
+int mbedtls_test_rnd_zero_rand(void *rng_state,
+                               unsigned char *output,
+                               size_t len)
 {
-    if( rng_state != NULL )
+    if (rng_state != NULL) {
         rng_state  = NULL;
+    }
 
-    memset( output, 0, len );
+    memset(output, 0, len);
 
-    return( 0 );
+    return 0;
 }
 
-int mbedtls_test_rnd_buffer_rand( void *rng_state,
-                                  unsigned char *output,
-                                  size_t len )
+int mbedtls_test_rnd_buffer_rand(void *rng_state,
+                                 unsigned char *output,
+                                 size_t len)
 {
     mbedtls_test_rnd_buf_info *info = (mbedtls_test_rnd_buf_info *) rng_state;
     size_t use_len;
 
-    if( rng_state == NULL )
-        return( mbedtls_test_rnd_std_rand( NULL, output, len ) );
+    if (rng_state == NULL) {
+        return mbedtls_test_rnd_std_rand(NULL, output, len);
+    }
 
     use_len = len;
-    if( len > info->length )
+    if (len > info->length) {
         use_len = info->length;
+    }
 
-    if( use_len )
-    {
-        memcpy( output, info->buf, use_len );
+    if (use_len) {
+        memcpy(output, info->buf, use_len);
         info->buf += use_len;
         info->length -= use_len;
     }
 
-    if( len - use_len > 0 )
-    {
-        if( info->fallback_f_rng != NULL )
-        {
-            return( info->fallback_f_rng( info->fallback_p_rng,
-                                          output + use_len,
-                                          len - use_len ) );
+    if (len - use_len > 0) {
+        if (info->fallback_f_rng != NULL) {
+            return info->fallback_f_rng(info->fallback_p_rng,
+                                        output + use_len,
+                                        len - use_len);
+        } else {
+            return MBEDTLS_ERR_ENTROPY_SOURCE_FAILED;
         }
-        else
-            return( MBEDTLS_ERR_ENTROPY_SOURCE_FAILED );
     }
 
-    return( 0 );
+    return 0;
 }
 
-int mbedtls_test_rnd_pseudo_rand( void *rng_state,
-                                  unsigned char *output,
-                                  size_t len )
+int mbedtls_test_rnd_pseudo_rand(void *rng_state,
+                                 unsigned char *output,
+                                 size_t len)
 {
     mbedtls_test_rnd_pseudo_info *info =
         (mbedtls_test_rnd_pseudo_info *) rng_state;
-    uint32_t i, *k, sum, delta=0x9E3779B9;
+    uint32_t i, *k, sum, delta = 0x9E3779B9;
     unsigned char result[4], *out = output;
 
-    if( rng_state == NULL )
-        return( mbedtls_test_rnd_std_rand( NULL, output, len ) );
+    if (rng_state == NULL) {
+        return mbedtls_test_rnd_std_rand(NULL, output, len);
+    }
 
     k = info->key;
 
-    while( len > 0 )
-    {
-        size_t use_len = ( len > 4 ) ? 4 : len;
+    while (len > 0) {
+        size_t use_len = (len > 4) ? 4 : len;
         sum = 0;
 
-        for( i = 0; i < 32; i++ )
-        {
-            info->v0 += ( ( ( info->v1 << 4 ) ^ ( info->v1 >> 5 ) )
-                            + info->v1 ) ^ ( sum + k[sum & 3] );
+        for (i = 0; i < 32; i++) {
+            info->v0 += (((info->v1 << 4) ^ (info->v1 >> 5))
+                         + info->v1) ^ (sum + k[sum & 3]);
             sum += delta;
-            info->v1 += ( ( ( info->v0 << 4 ) ^ ( info->v0 >> 5 ) )
-                            + info->v0 ) ^ ( sum + k[( sum>>11 ) & 3] );
+            info->v1 += (((info->v0 << 4) ^ (info->v0 >> 5))
+                         + info->v0) ^ (sum + k[(sum>>11) & 3]);
         }
 
-        PUT_UINT32_BE( info->v0, result, 0 );
-        memcpy( out, result, use_len );
+        PUT_UINT32_BE(info->v0, result, 0);
+        memcpy(out, result, use_len);
         len -= use_len;
         out += 4;
     }
 
-    return( 0 );
+    return 0;
 }