diff --git a/backend.native/tests/build.gradle b/backend.native/tests/build.gradle
index 48ce6bb6f89..b03465588cc 100644
--- a/backend.native/tests/build.gradle
+++ b/backend.native/tests/build.gradle
@@ -88,4 +88,17 @@ task aritmetic(type: KonanTest) {
 
 task sum1(type: KonanTest) {
     source = "codegen/function/sum_foo_bar.kt"
-}
\ No newline at end of file
+}
+
+task sum2(type: KonanTest) {
+    source = "codegen/function/sum_imm.kt"
+}
+
+task sum_3const(type: KonanTest) {
+    source = "codegen/function/sum_3const.kt"
+}
+
+// TODO: waiting for boolean to be implemented
+//task bool_yes(type: KonanTest) {
+//    source = "codegen/function/boolean.kt"
+//}
\ No newline at end of file
diff --git a/backend.native/tests/codegen/function/boolean-test.c b/backend.native/tests/codegen/function/boolean-test.c
new file mode 100644
index 00000000000..016ee5c4a2b
--- /dev/null
+++ b/backend.native/tests/codegen/function/boolean-test.c
@@ -0,0 +1,10 @@
+extern void *resolve_symbol(const char*);
+
+int
+run_test() {
+  int (*bool_yes)() = resolve_symbol("kfun:bool_yes");
+
+  if (!bool_yes()) return 1;
+
+  return 0;
+}
diff --git a/backend.native/tests/codegen/function/boolean.kt b/backend.native/tests/codegen/function/boolean.kt
new file mode 100644
index 00000000000..846979d9f28
--- /dev/null
+++ b/backend.native/tests/codegen/function/boolean.kt
@@ -0,0 +1 @@
+fun bool_yes(): Boolean = true
diff --git a/backend.native/tests/codegen/function/sum_3const-test.c b/backend.native/tests/codegen/function/sum_3const-test.c
new file mode 100644
index 00000000000..f547dc8ca55
--- /dev/null
+++ b/backend.native/tests/codegen/function/sum_3const-test.c
@@ -0,0 +1,10 @@
+extern void *resolve_symbol(const char*);
+
+int
+run_test() {
+  int (*sum3)() = resolve_symbol("kfun:sum3");
+
+  if (sum3() != 36) return 1;
+
+  return 0;
+}
diff --git a/backend.native/tests/codegen/function/sum_3const.kt b/backend.native/tests/codegen/function/sum_3const.kt
new file mode 100644
index 00000000000..a9815b61f6b
--- /dev/null
+++ b/backend.native/tests/codegen/function/sum_3const.kt
@@ -0,0 +1,2 @@
+fun sum3():Int = sum(1, 2, 33)
+fun sum(a:Int, b:Int, c:Int): Int = a + b + c
diff --git a/backend.native/tests/codegen/function/sum_imm-test.c b/backend.native/tests/codegen/function/sum_imm-test.c
new file mode 100644
index 00000000000..0b65df8f1ec
--- /dev/null
+++ b/backend.native/tests/codegen/function/sum_imm-test.c
@@ -0,0 +1,10 @@
+extern void *resolve_symbol(const char*);
+
+int
+run_test() {
+  int (*sum)(int) = resolve_symbol("kfun:sum");
+
+  if (sum(2) != 35) return 1;
+
+  return 0;
+}
diff --git a/backend.native/tests/codegen/function/sum_imm.kt b/backend.native/tests/codegen/function/sum_imm.kt
new file mode 100644
index 00000000000..35aa434b854
--- /dev/null
+++ b/backend.native/tests/codegen/function/sum_imm.kt
@@ -0,0 +1 @@
+fun sum(a:Int): Int = a + 33
\ No newline at end of file