diff --git a/crates/tests/src/lib.rs b/crates/tests/src/lib.rs
index 1b5dbc5..8efe800 100644
--- a/crates/tests/src/lib.rs
+++ b/crates/tests/src/lib.rs
@@ -985,13 +985,13 @@ async fn touch() {
         .await;
 
     TestBuilder::new()
-        .command("touch ~/absolute_path.txt")
-        .assert_exists("~/absolute_path.txt")
+        .command("touch $TEMP_DIR/absolute_path.txt")
+        .assert_exists("$TEMP_DIR/absolute_path.txt")
         .run()
         .await;
 
     TestBuilder::new()
-        .command("touch ~/non_existent_dir/non_existent.txt")
+        .command("touch $TEMP_DIR/non_existent_dir/non_existent.txt")
         .assert_stderr_contains("No such file or directory")
         .assert_exit_code(1)
         .run()
diff --git a/crates/tests/src/test_builder.rs b/crates/tests/src/test_builder.rs
index c46fd3b..14215d7 100644
--- a/crates/tests/src/test_builder.rs
+++ b/crates/tests/src/test_builder.rs
@@ -117,6 +117,8 @@ impl TestBuilder {
     fn get_temp_dir(&mut self) -> &mut TempDir {
         if self.temp_dir.is_none() {
             self.temp_dir = Some(TempDir::new());
+            let temp_dir_string = self.temp_dir_path().display().to_string();
+            self.env_vars.insert("TEMP_DIR".to_string(), temp_dir_string);
         }
         self.temp_dir.as_mut().unwrap()
     }
@@ -189,8 +191,13 @@ impl TestBuilder {
 
     pub fn assert_exists(&mut self, path: &str) -> &mut Self {
         self.ensure_temp_dir();
+        let temp_dir =  if let Some(temp_dir) = &self.temp_dir {
+            temp_dir.cwd.display().to_string()
+        } else {
+            "NO_TEMP_DIR".to_string()
+        };
         self.assertions
-            .push(TestAssertion::FileExists(path.to_string()));
+            .push(TestAssertion::FileExists(path.to_string().replace("$TEMP_DIR", &temp_dir)));
         self
     }
 
@@ -247,7 +254,7 @@ impl TestBuilder {
             );
         } else if !self.expected_stderr_contains.is_empty() {
             assert!(
-                stderr_output.contains(&self.expected_stderr_contains),
+                stderr_output.contains(&self.expected_stderr_contains.replace("$TEMP_DIR", &temp_dir)),
                 "\n\nFailed for: {}\nExpected stderr to contain: {}",
                 self.command,
                 self.expected_stderr_contains
@@ -270,15 +277,8 @@ impl TestBuilder {
         for assertion in &self.assertions {
             match assertion {
                 TestAssertion::FileExists(path) => {
-                    let path_to_check = if path.starts_with('/') {
-                        PathBuf::from(path)
-                    } else if path.starts_with("~/") {
-                        dirs::home_dir()
-                            .unwrap()
-                            .join(path.strip_prefix("~/").unwrap())
-                    } else {
-                        cwd.join(path)
-                    };
+                    let path_to_check = cwd.join(path);
+                    
                     assert!(
                         path_to_check.exists(),
                         "\n\nFailed for: {}\nExpected '{}' to exist.",