diff --git a/src/main.rs b/src/main.rs
index 2a9a380..b5ae892 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -12,6 +12,10 @@ mod scanner;
 mod tests;
 
 fn main() -> Result<()> {
+    run()
+}
+
+fn run() -> std::result::Result<(), anyhow::Error> {
     println!("Forgejo TODO Checker!");
 
     let config = init_config()?;
diff --git a/src/tests/data/file_1.txt b/src/tests/data/file_with_invalids.txt
similarity index 100%
rename from src/tests/data/file_1.txt
rename to src/tests/data/file_with_invalids.txt
diff --git a/src/tests/data/file_2.txt b/src/tests/data/file_with_valids.txt
similarity index 100%
rename from src/tests/data/file_2.txt
rename to src/tests/data/file_with_valids.txt
diff --git a/src/tests/init.rs b/src/tests/init.rs
index 6cb0140..96764ab 100644
--- a/src/tests/init.rs
+++ b/src/tests/init.rs
@@ -8,6 +8,7 @@ use patterns::{issue_pattern, marker_pattern};
 #[test]
 fn init_when_all_valid() -> anyhow::Result<()> {
     //given
+    let _env = THE_ENVIRONMENT.lock();
     let fs = kxio::fs::temp()?;
     std::env::set_var("GITHUB_WORKSPACE", fs.base());
     std::env::set_var("GITHUB_REPOSITORY", "repo");
@@ -43,6 +44,7 @@ fn init_when_all_valid() -> anyhow::Result<()> {
 #[test]
 fn init_when_no_workspace() -> anyhow::Result<()> {
     //given
+    let _env = THE_ENVIRONMENT.lock();
     std::env::remove_var("GITHUB_WORKSPACE");
     std::env::set_var("GITHUB_REPOSITORY", "repo");
     std::env::set_var("GITHUB_SERVER_URL", "server");
@@ -60,6 +62,7 @@ fn init_when_no_workspace() -> anyhow::Result<()> {
 #[test]
 fn init_when_no_repository() -> anyhow::Result<()> {
     //given
+    let _env = THE_ENVIRONMENT.lock();
     let fs = kxio::fs::temp()?;
     std::env::set_var("GITHUB_WORKSPACE", fs.base());
     std::env::remove_var("GITHUB_REPOSITORY");
@@ -78,6 +81,7 @@ fn init_when_no_repository() -> anyhow::Result<()> {
 #[test]
 fn init_when_no_server_url() -> anyhow::Result<()> {
     //given
+    let _env = THE_ENVIRONMENT.lock();
     let fs = kxio::fs::temp()?;
     std::env::set_var("GITHUB_WORKSPACE", fs.base());
     std::env::set_var("GITHUB_REPOSITORY", "repo");
diff --git a/src/tests/mod.rs b/src/tests/mod.rs
index 33776f6..b2b2058 100644
--- a/src/tests/mod.rs
+++ b/src/tests/mod.rs
@@ -1,5 +1,10 @@
+use std::sync::{LazyLock, Mutex};
+
 //
 use super::*;
 
 mod init;
+mod run;
 mod scanner;
+
+pub static THE_ENVIRONMENT: LazyLock<Mutex<()>> = LazyLock::new(|| Mutex::new(()));
diff --git a/src/tests/run.rs b/src/tests/run.rs
new file mode 100644
index 0000000..f681928
--- /dev/null
+++ b/src/tests/run.rs
@@ -0,0 +1,54 @@
+//
+use super::*;
+
+use anyhow::Result;
+
+#[test]
+fn run_with_some_invalids() -> Result<()> {
+    //given
+    let _env = THE_ENVIRONMENT.lock();
+    let fs = kxio::fs::temp()?;
+    fs.file_write(
+        &fs.base().join("file_with_invalids.txt"),
+        include_str!("data/file_with_invalids.txt"),
+    )?;
+    fs.file_write(
+        &fs.base().join("file_with_valids.txt"),
+        include_str!("data/file_with_valids.txt"),
+    )?;
+    std::env::set_var("GITHUB_WORKSPACE", fs.base());
+    std::env::set_var("GITHUB_REPOSITORY", "kemitix/test");
+    std::env::set_var("GITHUB_SERVER_URL", "https://git.kemitix.net");
+
+    //when
+    run()?;
+
+    //then
+    // TODO: add check that run fails because file_1.txt is invalid
+    // TODO: add check that network requests were made to get issues
+
+    Ok(())
+}
+
+#[test]
+fn run_with_no_invalids() -> Result<()> {
+    //given
+    let _env = THE_ENVIRONMENT.lock();
+    let fs = kxio::fs::temp()?;
+    fs.file_write(
+        &fs.base().join("file_with_valids.txt"),
+        include_str!("data/file_with_valids.txt"),
+    )?;
+    std::env::set_var("GITHUB_WORKSPACE", fs.base());
+    std::env::set_var("GITHUB_REPOSITORY", "kemitix/test");
+    std::env::set_var("GITHUB_SERVER_URL", "https://git.kemitix.net");
+
+    //when
+    run()?;
+
+    //then
+    // TODO: add check that run fails because file_1.txt is invalid
+    // TODO: add check that network requests were made to get issues
+
+    Ok(())
+}
diff --git a/src/tests/scanner.rs b/src/tests/scanner.rs
index 18117af..9e586a6 100644
--- a/src/tests/scanner.rs
+++ b/src/tests/scanner.rs
@@ -9,12 +9,12 @@ fn find_markers_in_dir() -> anyhow::Result<()> {
     //given
     let fs = kxio::fs::temp()?;
     fs.file_write(
-        &fs.base().join("file_1.txt"),
-        include_str!("data/file_1.txt"),
+        &fs.base().join("file_with_invalids.txt"),
+        include_str!("data/file_with_invalids.txt"),
     )?;
     fs.file_write(
-        &fs.base().join("file_2.txt"),
-        include_str!("data/file_2.txt"),
+        &fs.base().join("file_with_valids.txt"),
+        include_str!("data/file_with_valids.txt"),
     )?;
 
     let config = Config::builder()
@@ -32,13 +32,13 @@ fn find_markers_in_dir() -> anyhow::Result<()> {
     assert_eq!(
         markers.to_string().lines().collect::<Vec<_>>(),
         vec![
-            "- Invalid: file_1.txt#2:",
+            "- Invalid: file_with_invalids.txt#2:",
             " It contains a todo comment: // TODO: this is it",
-            "- Invalid: file_1.txt#4:",
+            "- Invalid: file_with_invalids.txt#4:",
             " It also contains a fix-me comment: // FIXME: and this is it",
-            "- Valid  : file_2.txt#2:",
+            "- Valid  : file_with_valids.txt#2:",
             " It also has a todo comment: // TODO: (#23) and it has an issue number",
-            "- Valid  : file_2.txt#4:",
+            "- Valid  : file_with_valids.txt#4:",
             " Here is a fix-me comment: // FIXME: (#43) and is also has an issue number"
         ]
     );