diff --git a/mysql-test/r/mysql_client_test.result b/mysql-test/r/mysql_client_test.result
index f30c64f6bef9a89eba6b7f607a968ff220bcbc45..7875464ebe298bb5b01baad2d36a4806a9596833 100644
--- a/mysql-test/r/mysql_client_test.result
+++ b/mysql-test/r/mysql_client_test.result
@@ -1,4 +1,5 @@
 SET @old_general_log= @@global.general_log;
+SET @old_slow_query_log= @@global.slow_query_log;
 ok
 
 # cat MYSQL_TMP_DIR/test_wl4435.out.log
@@ -120,3 +121,4 @@ mysql_stmt_next_result(): 0; field_count: 0
 # ------------------------------------
 
 SET @@global.general_log= @old_general_log;
+SET @@global.slow_query_log= @old_slow_query_log;
diff --git a/mysql-test/t/mysql_client_test.test b/mysql-test/t/mysql_client_test.test
index c8c1fba04e15ad87b5bded9dd94ef669af8d2d75..2c19671d11bc44bd443b20592861e347cbd788ad 100644
--- a/mysql-test/t/mysql_client_test.test
+++ b/mysql-test/t/mysql_client_test.test
@@ -2,6 +2,7 @@
 -- source include/not_embedded.inc
 
 SET @old_general_log= @@global.general_log;
+SET @old_slow_query_log= @@global.slow_query_log;
 
 # We run with different binaries for normal and --embedded-server
 #
@@ -24,3 +25,4 @@ echo ok;
 --echo
 
 SET @@global.general_log= @old_general_log;
+SET @@global.slow_query_log= @old_slow_query_log;
diff --git a/sql/sql_prepare.cc b/sql/sql_prepare.cc
index a9c4f3f090df7c01f5b01c469f1b9ac605278b8e..e6731a7bc4d93a4509c52894231be3507da59327 100644
--- a/sql/sql_prepare.cc
+++ b/sql/sql_prepare.cc
@@ -882,7 +882,7 @@ static bool insert_params_with_log(Prepared_statement *stmt, uchar *null_array,
       type (the types are supplied at execute). Check that the
       supplied type of placeholder can accept a data stream.
     */
-    else if (!is_param_long_data_type(param))
+    else if (! is_param_long_data_type(param))
       DBUG_RETURN(1);
     res= param->query_val_str(&str);
     if (param->convert_str_value(thd))
@@ -928,7 +928,7 @@ static bool insert_params(Prepared_statement *stmt, uchar *null_array,
       type (the types are supplied at execute). Check that the
       supplied type of placeholder can accept a data stream.
     */
-    else if (is_param_long_data_type(param))
+    else if (! is_param_long_data_type(param))
       DBUG_RETURN(1);
     if (param->convert_str_value(stmt->thd))
       DBUG_RETURN(1);                           /* out of memory */
diff --git a/tests/mysql_client_test.c b/tests/mysql_client_test.c
index a364007788904931ef26fe56da22489024af3bce..f9adeb873bb8df6c149ce804c8d8e8aa07a93c7f 100644
--- a/tests/mysql_client_test.c
+++ b/tests/mysql_client_test.c
@@ -13831,37 +13831,52 @@ static void test_bug15518()
 }
 
 
-static void disable_general_log()
+static void disable_query_logs()
 {
   int rc;
   rc= mysql_query(mysql, "set @@global.general_log=off");
   myquery(rc);
+  rc= mysql_query(mysql, "set @@global.slow_query_log=off");
+  myquery(rc);
 }
 
 
-static void enable_general_log(int truncate)
+static void enable_query_logs(int truncate)
 {
   int rc;
 
   rc= mysql_query(mysql, "set @save_global_general_log=@@global.general_log");
   myquery(rc);
 
+  rc= mysql_query(mysql, "set @save_global_slow_query_log=@@global.slow_query_log");
+  myquery(rc);
+
   rc= mysql_query(mysql, "set @@global.general_log=on");
   myquery(rc);
 
+  rc= mysql_query(mysql, "set @@global.slow_query_log=on");
+  myquery(rc);
+
+
   if (truncate)
   {
     rc= mysql_query(mysql, "truncate mysql.general_log");
     myquery(rc);
+
+    rc= mysql_query(mysql, "truncate mysql.slow_log");
+    myquery(rc);
   }
 }
 
 
-static void restore_general_log()
+static void restore_query_logs()
 {
   int rc;
   rc= mysql_query(mysql, "set @@global.general_log=@save_global_general_log");
   myquery(rc);
+
+  rc= mysql_query(mysql, "set @@global.slow_query_log=@save_global_slow_query_log");
+  myquery(rc);
 }
 
 
@@ -16031,7 +16046,7 @@ static void test_bug17667()
     return;
   }
 
-  enable_general_log(1);
+  enable_query_logs(1);
 
   for (statement_cursor= statements; statement_cursor->buffer != NULL;
        statement_cursor++)
@@ -16111,7 +16126,7 @@ static void test_bug17667()
              statement_cursor->buffer);
   }
 
-  restore_general_log();
+  restore_query_logs();
 
   if (!opt_silent)
     printf("success.  All queries found intact in the log.\n");
@@ -17974,7 +17989,7 @@ static void test_bug28386()
   }
   mysql_free_result(result);
 
-  enable_general_log(1);
+  enable_query_logs(1);
 
   stmt= mysql_simple_prepare(mysql, "SELECT ?");
   check_stmt(stmt);
@@ -18013,7 +18028,7 @@ static void test_bug28386()
 
   mysql_free_result(result);
 
-  restore_general_log();
+  restore_query_logs();
 
   DBUG_VOID_RETURN;
 }
@@ -19064,7 +19079,7 @@ static void test_bug42373()
   Bug#54041: MySQL 5.0.92 fails when tests from Connector/C suite run
 */
 
-static void test_bug54041()
+static void test_bug54041_impl()
 {
   int rc;
   MYSQL_STMT *stmt;
@@ -19079,7 +19094,7 @@ static void test_bug54041()
   rc= mysql_query(mysql, "CREATE TABLE t1 (a INT)");
   myquery(rc);
 
-  stmt= mysql_simple_prepare(mysql, "INSERT INTO t1 (a) VALUES (?)");
+  stmt= mysql_simple_prepare(mysql, "SELECT a FROM t1 WHERE a > ?");
   check_stmt(stmt);
   verify_param_count(stmt, 1);
 
@@ -19117,6 +19132,20 @@ static void test_bug54041()
 }
 
 
+/**
+  Bug#54041: MySQL 5.0.92 fails when tests from Connector/C suite run
+*/
+
+static void test_bug54041()
+{
+  enable_query_logs(0);
+  test_bug54041_impl();
+  disable_query_logs();
+  test_bug54041_impl();
+  restore_query_logs();
+}
+
+
 /*
   Bug#49972: Crash in prepared statements.
 
@@ -19306,7 +19335,7 @@ and you are welcome to modify and redistribute it under the GPL license\n");
 
 
 static struct my_tests_st my_tests[]= {
-  { "disable_general_log", disable_general_log },
+  { "disable_query_logs", disable_query_logs },
   { "test_view_sp_list_fields", test_view_sp_list_fields },
   { "client_query", client_query },
   { "test_prepare_insert_update", test_prepare_insert_update},