diff --git a/src/test/resources/modules/std/parseInt.own b/src/test/resources/modules/std/parseInt.own
new file mode 100644
index 0000000..7aa4a29
--- /dev/null
+++ b/src/test/resources/modules/std/parseInt.own
@@ -0,0 +1,17 @@
+use "std"
+
+def testParseInt() {
+  assertEquals(141, parseInt("141"))
+}
+
+def testParseIntBin() {
+  assertEquals(141, parseInt("10001101", 2))
+}
+
+def testParseIntOct() {
+  assertEquals(141, parseInt("215", 8))
+}
+
+def testParseIntHex() {
+  assertEquals(141, parseInt("8D", 16))
+}
\ No newline at end of file
diff --git a/src/test/resources/modules/std/parseLong.own b/src/test/resources/modules/std/parseLong.own
new file mode 100644
index 0000000..77d426d
--- /dev/null
+++ b/src/test/resources/modules/std/parseLong.own
@@ -0,0 +1,18 @@
+use "std"
+
+def testParseInt() {
+  assertEquals(12345654321, parseLong("12345654321"))
+}
+
+def testParseIntBin() {
+  assertEquals(12345654321, parseLong("1011011111110110111011110000110001", 2))
+}
+
+def testParseIntOct() {
+  assertEquals(12345654321, parseLong("133766736061", 8))
+}
+
+def testParseIntHex() {
+  assertEquals(#2DFDBBC31, parseLong("2DFDBBC31", 16))
+  assertEquals(12345654321, parseLong("2DFDBBC31", 16))
+}
\ No newline at end of file
diff --git a/src/test/resources/modules/std/toHexString.own b/src/test/resources/modules/std/toHexString.own
new file mode 100644
index 0000000..f557fc1
--- /dev/null
+++ b/src/test/resources/modules/std/toHexString.own
@@ -0,0 +1,7 @@
+use "std"
+
+def testToHexString() {
+  assertEquals("8d", toHexString(141))
+  assertEquals("cafebabe", toHexString(#CAFEBABE))
+  assertEquals("2dfdbbc31", toHexString(12345654321))
+}