diff --git a/Cargo.lock b/Cargo.lock
index 5b32f65ac2..e3ad834687 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1485,6 +1485,7 @@ dependencies = [
  "leo-compiler",
  "leo-imports",
  "leo-parser",
+ "regex",
  "serde",
  "serde_json",
  "serde_yaml",
diff --git a/test-framework/Cargo.toml b/test-framework/Cargo.toml
index f32f3fe07a..169193230f 100644
--- a/test-framework/Cargo.toml
+++ b/test-framework/Cargo.toml
@@ -55,3 +55,7 @@ version = "1.5.2"
 
 [dependencies.structopt]
 version = "0.3"
+
+# List of dependencies for errcov
+[dependencies.regex]
+version = "1.5"
\ No newline at end of file
diff --git a/test-framework/src/bin/errcov.rs b/test-framework/src/bin/errcov.rs
new file mode 100644
index 0000000000..b3a9a88cf3
--- /dev/null
+++ b/test-framework/src/bin/errcov.rs
@@ -0,0 +1,117 @@
+// Copyright (C) 2019-2021 Aleo Systems Inc.
+// This file is part of the Leo library.
+
+// The Leo library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// The Leo library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with the Leo library. If not, see <https://www.gnu.org/licenses/>.
+
+use leo_asg::Asg;
+use leo_ast::AstPass;
+use leo_compiler::{compiler::thread_leaked_context, TypeInferencePhase};
+use leo_imports::ImportParser;
+use leo_test_framework::{
+    fetch::find_tests,
+    output::TestExpectation,
+    test::{extract_test_config, TestExpectationMode as Expectation},
+};
+
+use regex::Regex;
+use std::{collections::HashSet, error::Error, fs, path::PathBuf};
+use structopt::{clap::AppSettings, StructOpt};
+
+#[derive(StructOpt)]
+#[structopt(name = "error-coverage", author = "The Aleo Team <hello@aleo.org>", setting = AppSettings::ColoredHelp)]
+struct Opt {
+    #[structopt(short, long, help = "Path to the output file", parse(from_os_str))]
+    output: PathBuf,
+}
+
+fn main() {
+    handle_error(run_with_args(Opt::from_args()));
+}
+
+fn run_with_args(opt: Opt) -> Result<(), Box<dyn Error>> {
+    // Variable that stores all the tests.
+    let mut tests = Vec::new();
+    let mut test_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+    test_dir.push("../tests/");
+
+    let mut expectation_dir = test_dir.clone();
+    expectation_dir.push("expectations");
+
+    find_tests(&test_dir, &mut tests);
+
+    // Store all covered error codes
+    let mut codes = HashSet::new();
+    let re = Regex::new(r"Error \[(?P<code>.*)\]:.*").unwrap();
+
+    for (path, content) in tests.into_iter() {
+        if let Some(config) = extract_test_config(&content) {
+            // Skip passing tests.
+            if config.expectation == Expectation::Pass {
+                continue;
+            }
+
+            let mut expectation_path = expectation_dir.clone();
+
+            let path = PathBuf::from(path);
+            let relative_path = path.strip_prefix(&test_dir).expect("path error for test");
+
+            let mut relative_expectation_path = relative_path.to_str().unwrap().to_string();
+            relative_expectation_path += ".out";
+
+            // Add expectation category
+            if relative_expectation_path.starts_with("compiler") {
+                expectation_path.push("compiler");
+            } else {
+                expectation_path.push("parser");
+            }
+            expectation_path.push(&relative_expectation_path);
+
+            if expectation_path.exists() {
+                let raw = std::fs::read_to_string(&expectation_path).expect("failed to read expectations file");
+                let expectation: TestExpectation =
+                    serde_yaml::from_str(&raw).expect("invalid yaml in expectations file");
+
+                for value in expectation.outputs {
+                    if let serde_yaml::Value::String(message) = value {
+                        if let Some(caps) = re.captures(&message) {
+                            if let Some(code) = caps.name("code") {
+                                codes.insert(code.as_str().to_string());
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    let mut sorted: Vec<_> = codes.iter().collect();
+    sorted.sort();
+
+    println!("Found the following error codes");
+    for code in sorted {
+        println!("{}", code)
+    }
+
+    Ok(())
+}
+
+fn handle_error(res: Result<(), Box<dyn Error>>) {
+    match res {
+        Ok(_) => (),
+        Err(err) => {
+            eprintln!("Error: {}", err);
+            std::process::exit(1);
+        }
+    }
+}