diff --git a/build/hint.json b/build/hint.json
index 7bd8ba0b6..342d0802c 100644
--- a/build/hint.json
+++ b/build/hint.json
@@ -1,8 +1,15 @@
 {
     "attributes": [],
-    "builtins": [],
+    "builtins": [
+        "output"
+    ],
     "compiler_version": "0.12.2",
     "data": [
+        "0x480680017fff8000",
+        "0x11",
+        "0x480280007ffd7fff",
+        "0x482680017ffd8000",
+        "0x1",
         "0x208b7fff7fff7ffe"
     ],
     "debug_info": {
@@ -19,37 +26,127 @@
                         "offset": 0
                     },
                     "reference_ids": {
-                        "__main__.main.a": 0
+                        "__main__.main.output_ptr": 0
+                    }
+                },
+                "hints": [],
+                "inst": {
+                    "end_col": 19,
+                    "end_line": 4,
+                    "input_file": {
+                        "filename": "tests/contracts/hint.cairo"
+                    },
+                    "start_col": 17,
+                    "start_line": 4
+                }
+            },
+            "2": {
+                "accessible_scopes": [
+                    "__main__",
+                    "__main__.main"
+                ],
+                "flow_tracking_data": {
+                    "ap_tracking": {
+                        "group": 0,
+                        "offset": 1
+                    },
+                    "reference_ids": {
+                        "__main__.main.a": 1,
+                        "__main__.main.output_ptr": 0
+                    }
+                },
+                "hints": [],
+                "inst": {
+                    "end_col": 27,
+                    "end_line": 5,
+                    "input_file": {
+                        "filename": "tests/contracts/hint.cairo"
+                    },
+                    "start_col": 5,
+                    "start_line": 5
+                }
+            },
+            "3": {
+                "accessible_scopes": [
+                    "__main__",
+                    "__main__.main"
+                ],
+                "flow_tracking_data": {
+                    "ap_tracking": {
+                        "group": 0,
+                        "offset": 2
+                    },
+                    "reference_ids": {
+                        "__main__.main.a": 1,
+                        "__main__.main.output_ptr": 2
                     }
                 },
                 "hints": [
                     {
                         "location": {
                             "end_col": 23,
-                            "end_line": 4,
+                            "end_line": 8,
                             "input_file": {
                                 "filename": "tests/contracts/hint.cairo"
                             },
                             "start_col": 5,
-                            "start_line": 4
+                            "start_line": 8
                         },
                         "n_prefix_newlines": 0
                     }
                 ],
                 "inst": {
-                    "end_col": 15,
-                    "end_line": 5,
+                    "end_col": 36,
+                    "end_line": 9,
+                    "input_file": {
+                        "filename": "tests/contracts/hint.cairo"
+                    },
+                    "parent_location": [
+                        {
+                            "end_col": 35,
+                            "end_line": 11,
+                            "input_file": {
+                                "filename": "tests/contracts/hint.cairo"
+                            },
+                            "start_col": 25,
+                            "start_line": 11
+                        },
+                        "While expanding the reference 'output_ptr' in:"
+                    ],
+                    "start_col": 22,
+                    "start_line": 9
+                }
+            },
+            "5": {
+                "accessible_scopes": [
+                    "__main__",
+                    "__main__.main"
+                ],
+                "flow_tracking_data": {
+                    "ap_tracking": {
+                        "group": 0,
+                        "offset": 3
+                    },
+                    "reference_ids": {
+                        "__main__.main.a": 1,
+                        "__main__.main.output_ptr": 2
+                    }
+                },
+                "hints": [],
+                "inst": {
+                    "end_col": 37,
+                    "end_line": 11,
                     "input_file": {
                         "filename": "tests/contracts/hint.cairo"
                     },
                     "start_col": 5,
-                    "start_line": 5
+                    "start_line": 11
                 }
             }
         }
     },
     "hints": {
-        "0": [
+        "3": [
             {
                 "accessible_scopes": [
                     "__main__",
@@ -59,10 +156,11 @@
                 "flow_tracking_data": {
                     "ap_tracking": {
                         "group": 0,
-                        "offset": 0
+                        "offset": 2
                     },
                     "reference_ids": {
-                        "__main__.main.a": 0
+                        "__main__.main.a": 1,
+                        "__main__.main.output_ptr": 0
                     }
                 }
             }
@@ -76,8 +174,13 @@
         },
         "__main__.main.Args": {
             "full_name": "__main__.main.Args",
-            "members": {},
-            "size": 0,
+            "members": {
+                "output_ptr": {
+                    "cairo_type": "felt*",
+                    "offset": 0
+                }
+            },
+            "size": 1,
             "type": "struct"
         },
         "__main__.main.ImplicitArgs": {
@@ -87,7 +190,7 @@
             "type": "struct"
         },
         "__main__.main.Return": {
-            "cairo_type": "()",
+            "cairo_type": "(output_ptr: felt*)",
             "type": "type_definition"
         },
         "__main__.main.SIZEOF_LOCALS": {
@@ -97,6 +200,21 @@
         "__main__.main.a": {
             "cairo_type": "felt",
             "full_name": "__main__.main.a",
+            "references": [
+                {
+                    "ap_tracking_data": {
+                        "group": 0,
+                        "offset": 1
+                    },
+                    "pc": 2,
+                    "value": "[cast(ap + (-1), felt*)]"
+                }
+            ],
+            "type": "reference"
+        },
+        "__main__.main.output_ptr": {
+            "cairo_type": "felt*",
+            "full_name": "__main__.main.output_ptr",
             "references": [
                 {
                     "ap_tracking_data": {
@@ -104,7 +222,15 @@
                         "offset": 0
                     },
                     "pc": 0,
-                    "value": "cast(17, felt)"
+                    "value": "[cast(fp + (-3), felt**)]"
+                },
+                {
+                    "ap_tracking_data": {
+                        "group": 0,
+                        "offset": 2
+                    },
+                    "pc": 3,
+                    "value": "cast([fp + (-3)] + 1, felt*)"
                 }
             ],
             "type": "reference"
@@ -120,7 +246,23 @@
                     "offset": 0
                 },
                 "pc": 0,
-                "value": "cast(17, felt)"
+                "value": "[cast(fp + (-3), felt**)]"
+            },
+            {
+                "ap_tracking_data": {
+                    "group": 0,
+                    "offset": 1
+                },
+                "pc": 2,
+                "value": "[cast(ap + (-1), felt*)]"
+            },
+            {
+                "ap_tracking_data": {
+                    "group": 0,
+                    "offset": 2
+                },
+                "pc": 3,
+                "value": "cast([fp + (-3)] + 1, felt*)"
             }
         ]
     }
diff --git a/build/test.zip b/build/test.zip
index a3b55fe07..9c8a8822c 100644
Binary files a/build/test.zip and b/build/test.zip differ
diff --git a/tests/common.rs b/tests/common.rs
index 960d3bf12..23f690d46 100644
--- a/tests/common.rs
+++ b/tests/common.rs
@@ -37,3 +37,28 @@ pub fn setup_pie() -> CairoPie {
 
     runner.get_cairo_pie(&vm).unwrap()
 }
+
+#[allow(unused)]
+pub fn compare_python_output(program: &str, mut vm: VirtualMachine) {
+    let mut rs_output = String::new();
+    vm.write_output(&mut rs_output).unwrap();
+    let rs_output = rs_output.split('\n').filter(|&x| !x.is_empty());
+    let python_output = std::process::Command::new("cairo-run")
+        .arg("--layout=small")
+        .arg(format!("--program={program:}"))
+        .arg("--print_output")
+        .output()
+        .expect("failed to run python vm");
+    let python_output = unsafe { std::str::from_utf8_unchecked(&python_output.stdout) }.to_string();
+    let python_output = python_output
+        .split('\n')
+        .into_iter()
+        .skip_while(|&x| x != "Program output:")
+        .skip(1)
+        .filter(|&x| !x.trim().is_empty())
+        .into_iter();
+    for (rs, py) in rs_output.zip(python_output) {
+        let py = py.to_string().trim().to_string();
+        assert_eq!(*rs, py);
+    }
+}
diff --git a/tests/contracts/hint.cairo b/tests/contracts/hint.cairo
index 31b816d0a..be24253fd 100644
--- a/tests/contracts/hint.cairo
+++ b/tests/contracts/hint.cairo
@@ -1,6 +1,12 @@
-func main() {
-    let a = 17;
+%builtins output
+
+func main(output_ptr: felt*) -> (output_ptr: felt*) {
+    tempvar a = 17;
+    a = [output_ptr], ap++;
+
     // Use custom hint to print the value of a
     %{ print(ids.a) %}
-    return ();
-}
\ No newline at end of file
+    let output_ptr = output_ptr + 1;
+
+    return(output_ptr = output_ptr);
+}
diff --git a/tests/snos.rs b/tests/snos.rs
index 07d6eb4ca..e65282d1e 100644
--- a/tests/snos.rs
+++ b/tests/snos.rs
@@ -1,3 +1,4 @@
+mod common;
 use cairo_vm::cairo_run::{cairo_run, CairoRunConfig};
 use cairo_vm::felt::Felt252;
 use cairo_vm::hint_processor::builtin_hint_processor::builtin_hint_processor_definition::{
@@ -8,6 +9,7 @@ use cairo_vm::hint_processor::hint_processor_definition::HintReference;
 use cairo_vm::serde::deserialize_program::ApTracking;
 use cairo_vm::types::exec_scope::ExecutionScopes;
 use cairo_vm::vm::{errors::hint_errors::HintError, vm_core::VirtualMachine};
+use common::compare_python_output;
 use snos::SnOsRunner;
 use std::collections::HashMap;
 use std::fs::File;
@@ -30,6 +32,7 @@ fn print_a_hint(
 
 #[test]
 fn custom_hint_ok() {
+    let program_path = "build/hint.json";
     // Wrap the Rust hint implementation in a Box smart pointer inside a HintFunc
     let hint = HintFunc(Box::new(print_a_hint));
 
@@ -39,13 +42,13 @@ fn custom_hint_ok() {
     //Add the custom hint, together with the Python code
     hint_processor.add_hint(String::from("print(ids.a)"), Rc::new(hint));
 
-    let file = File::open(Path::new("build/hint.json")).expect("Couldn't load file");
+    let file = File::open(Path::new(program_path)).expect("Couldn't load file");
     let mut reader = BufReader::new(file);
     let mut buffer = Vec::<u8>::new();
     reader.read_to_end(&mut buffer).expect("Couldn't read file");
 
     //Run the cairo program
-    cairo_run(
+    let (_cairo_runner, virtual_machine) = cairo_run(
         &buffer,
         &CairoRunConfig {
             layout: "all_cairo",
@@ -54,6 +57,7 @@ fn custom_hint_ok() {
         &mut hint_processor,
     )
     .expect("Couldn't run program");
+    compare_python_output(program_path, virtual_machine);
 }
 
 #[test]