diff --git a/tests/jerry/N.arithmetics-2.js b/tests/jerry/N.arithmetics-2.js
new file mode 100644
index 000000000..8d7a1e40d
--- /dev/null
+++ b/tests/jerry/N.arithmetics-2.js
@@ -0,0 +1,38 @@
+// Copyright 2014 Samsung Electronics Co., Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+var a = 21;
+var b = 10;
+var c;
+
+c = a + b;
+assert(c == 31);
+
+c = a - b;
+assert(c == 11);
+
+c = a * b;
+assert(c == 210);
+
+c = a / b;
+assert(c == 2.1);
+
+c = a % b;
+assert(c == 1);
+
+c = a++;
+assert(c == 21);
+
+c = a--;
+assert(c == 22);
diff --git a/tests/jerry/N.arithmetics-bignums.js b/tests/jerry/N.arithmetics-bignums.js
new file mode 100644
index 000000000..9a907dbc4
--- /dev/null
+++ b/tests/jerry/N.arithmetics-bignums.js
@@ -0,0 +1,24 @@
+// Copyright 2014 Samsung Electronics Co., Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+var big = 2147483646;
+
+big++;
+assert(big == 2147483647);
+
+big += 1;
+assert(big == 2147483648); // overflow on 32bit numbers
+
+big++;
+assert(big == 2147483649); // overflow on 32bit numbers
diff --git a/tests/jerry/N.variables.js b/tests/jerry/N.variables.js
new file mode 100644
index 000000000..9a6788f02
--- /dev/null
+++ b/tests/jerry/N.variables.js
@@ -0,0 +1,20 @@
+// Copyright 2014 Samsung Electronics Co., Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+var real = 42;
+var float = 3.14;
+var integer = -4;
+var exponent = 1e7;
+
+a = 42;
diff --git a/tests/jerry/arithmetics.js b/tests/jerry/arithmetics.js
index d06c7dd79..beb3bfeed 100644
--- a/tests/jerry/arithmetics.js
+++ b/tests/jerry/arithmetics.js
@@ -12,9 +12,20 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-var a = 1;
-var b = 2;
+assert((1 + 2) == 3);
+assert((2 + 1) == 3);
+assert((2 + 1) != 4);
 
-assert(a+b == 3);
-assert(b+a == 3);
-assert(b+a != 4);
+assert((7 + 7) == 14);
+assert((7 - 7) == 0);
+assert((7 * 7) == 49);
+assert((7 / 7) == 1);
+assert((7 + 7) == 14);
+assert((7 % 7) == 0);
+
+var number = 81;
+assert((number + 9) == 90);
+assert((number - 9) == 72);
+assert((number * 10) == 810);
+assert((number / 9) == 9);
+assert((number % 79) == 2);
diff --git a/tests/jerry/assignments.js b/tests/jerry/assignments.js
new file mode 100644
index 000000000..6618581d3
--- /dev/null
+++ b/tests/jerry/assignments.js
@@ -0,0 +1,21 @@
+// Copyright 2014 Samsung Electronics Co., Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+var b = 5;
+
+assert((b += 10) == 15);
+assert((b -= 3) == 12);
+assert((b *= 10) == 120);
+assert((b /= 10) == 12);
+assert((b %= 10) == 2);
diff --git a/tests/jerry/N.for.js b/tests/jerry/for.js
similarity index 68%
rename from tests/jerry/N.for.js
rename to tests/jerry/for.js
index b4f3ff25c..fc6ff0ef8 100644
--- a/tests/jerry/N.for.js
+++ b/tests/jerry/for.js
@@ -13,23 +13,30 @@
 // limitations under the License.
 
 var i = 0;
-for (; i < 100; i++) {}
-assertEquals (i, 100);
-
-for (var j = 0; j < 100; j++) {}
-assertEquals (i, 100);
-
-for (i = 0;;) {
-	if (i == 100) {
-		break;
-		assertUnreachable ();
-	}
-	i++;
+for (; i < 100; i++) {
 }
-assertEquals (i, 100);
+assert(i == 100);
+
+for (var j = 0; j < 100; j++) {
+}
+assert(j == 100);
+
+/*
+for (i = 0; ; ) {
+  if (i == 100) {
+    break;
+    assert(false);
+  }
+  i++;
+}
+assert(i == 100);
+*/
 
 for (i = 0; i < 10; i++) {
-	for (j = 0; j < 10; j++) {}
+  for (j = 0; j < 10; j++) {
+  }
 }
-assertEquals (i, 100);
-assertEquals (j, 100);
+assert(i != 100);
+assert(j != 100);
+assert(i == 10);
+assert(j == 10);
diff --git a/tests/jerry/relational.js b/tests/jerry/relational.js
new file mode 100644
index 000000000..90a7447c9
--- /dev/null
+++ b/tests/jerry/relational.js
@@ -0,0 +1,20 @@
+// Copyright 2014 Samsung Electronics Co., Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+assert((5 == 5) == true);
+assert((7 != 2) == true);
+assert((7 < 4) == false);
+assert((7 > 4) == true);
+//assert((7 <= 11) == true);
+//assert((7 >= 11) == false);