diff --git a/Cargo.lock b/Cargo.lock
index 0dd5107..1e29df1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -84,6 +84,12 @@ dependencies = [
  "windows-sys",
 ]
 
+[[package]]
+name = "anyhow"
+version = "1.0.72"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3b13c32d80ecc7ab747b80c3784bce54ee8a7a0cc4fbda9bf4cda2cf6fe90854"
+
 [[package]]
 name = "atom_syndication"
 version = "0.12.1"
@@ -1039,6 +1045,7 @@ checksum = "26072860ba924cbfa98ea39c8c19b4dd6a4a25423dbdf219c1eca91aa0cf6964"
 name = "podal"
 version = "0.1.0"
 dependencies = [
+ "anyhow",
  "atom_syndication",
  "bytes",
  "clap",
diff --git a/Cargo.toml b/Cargo.toml
index 04a0466..768b588 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,6 +11,7 @@ reqwest = { version = "0.11.18", features = ["json", "blocking"] }
 scraper = "0.17.1"
 clap = {version = "4.3.19", features = ["derive"]}
 bytes = "1.4.0"
+anyhow = "1.0.72"
 
 [dev-dependencies]
 tempfile = "*"
diff --git a/src/errors.rs b/src/errors.rs
index 1135c29..149c8e4 100644
--- a/src/errors.rs
+++ b/src/errors.rs
@@ -13,6 +13,14 @@ impl Error {
         }
     }
 }
+impl From<anyhow::Error> for Error {
+    fn from(value: anyhow::Error) -> Self {
+        Self {
+            details: value.to_string(),
+            source: value.source().unwrap().to_string(),
+        }
+    }
+}
 impl From<Utf8Error> for Error {
     fn from(value: Utf8Error) -> Self {
         Self {
diff --git a/src/file/env.rs b/src/file/env.rs
index 241de60..53eca4c 100644
--- a/src/file/env.rs
+++ b/src/file/env.rs
@@ -1,3 +1,5 @@
+use anyhow::Context;
+
 use crate::params::Args;
 use crate::prelude::*;
 
@@ -19,7 +21,9 @@ impl FileEnv {
         Self {
             open: Box::new(move |file_name| {
                 let path = format!("{}/{}", &open_dir, file_name);
-                let file = File::open(path)?;
+                let file = File::open(&path).with_context(|| {
+                    format!("FileEnv::open: file_name={file_name}, path={path}")
+                })?;
                 Ok(file)
             }),
             append_line: Box::new(move |file_name, line| {
diff --git a/src/file/read.rs b/src/file/read.rs
index 1bd98e8..93f3fae 100644
--- a/src/file/read.rs
+++ b/src/file/read.rs
@@ -33,6 +33,7 @@ mod tests {
         let file_env = FileEnv::create(&Args {
             downloads: dir.path().to_string_lossy().to_string(),
             history: "downloaded.txt".to_string(),
+            subscriptions: file_name.to_string(),
         });
 
         //when
@@ -55,6 +56,7 @@ mod tests {
         let file_env = FileEnv::create(&Args {
             downloads: dir.path().to_string_lossy().to_string(),
             history: "downloaded.txt".to_string(),
+            subscriptions: file_name.to_string(),
         });
 
         //when
@@ -77,6 +79,7 @@ mod tests {
         let file_env = FileEnv::create(&Args {
             downloads: dir.path().to_string_lossy().to_string(),
             history: "downloaded.txt".to_string(),
+            subscriptions: file_name.to_string(),
         });
 
         //when
diff --git a/src/history/add.rs b/src/history/add.rs
index 7ea8036..b22c4bd 100644
--- a/src/history/add.rs
+++ b/src/history/add.rs
@@ -42,6 +42,7 @@ mod tests {
             &FileEnv::create(&Args {
                 downloads: dir.path().to_string_lossy().to_string(),
                 history: "downloaded.txt".to_string(),
+                subscriptions: "subscriptions.txt".to_string(),
             }),
         )?;
 
@@ -76,6 +77,7 @@ mod tests {
             &FileEnv::create(&Args {
                 downloads: dir.path().to_string_lossy().to_string(),
                 history: "downloaded.txt".to_string(),
+                subscriptions: "subscriptions.txt".to_string(),
             }),
         )?;
 
diff --git a/src/history/find.rs b/src/history/find.rs
index 148a623..1397b48 100644
--- a/src/history/find.rs
+++ b/src/history/find.rs
@@ -41,6 +41,7 @@ mod test {
             &FileEnv::create(&Args {
                 downloads: dir.path().to_string_lossy().to_string(),
                 history: "downloaded.txt".to_string(),
+                subscriptions: "subscriptions.txt".to_string(),
             }),
         )?;
 
@@ -76,6 +77,7 @@ mod test {
             &FileEnv::create(&Args {
                 downloads: dir.path().to_string_lossy().to_string(),
                 history: "downloaded.txt".to_string(),
+                subscriptions: "subscriptions.txt".to_string(),
             }),
         )?;
 
@@ -111,6 +113,7 @@ mod test {
             &FileEnv::create(&Args {
                 downloads: dir.path().to_string_lossy().to_string(),
                 history: "downloaded.txt".to_string(),
+                subscriptions: "subscriptions.txt".to_string(),
             }),
         )?;
 
diff --git a/src/lib.rs b/src/lib.rs
index 2095452..c28d6c0 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -20,8 +20,8 @@ pub struct Env {
     pub file: FileEnv,
 }
 
-pub fn run(subscriptions: &str, site: &str, a: &Args, e: Env) -> Result<()> {
-    for channel_name in file::read::lines_from(subscriptions, &e.file)? {
+pub fn run(site: &str, a: &Args, e: Env) -> Result<()> {
+    for channel_name in file::read::lines_from(&a.subscriptions, &e.file)? {
         println!("Channel: {}", channel_name);
         let feed_url = feed::find(site, &channel_name, &e.network)?;
         for entry in feed::get(&feed_url, &e.network)?.entries() {
@@ -62,6 +62,8 @@ mod tests {
         let subs_file_name = "subs";
         let subs_dir =
             create_text_file(subs_file_name, "@channel1\nignore me\n@channel2".as_bytes())?;
+        let subs_file_name = format!("{}/{}", subs_dir.path().to_string_lossy(), subs_file_name);
+
         // one item from each channel is already listed in the downloads.txt file
         let history_file_name = "history";
         let history_dir = create_text_file(history_file_name, "c1-f2\nc2-f3".as_bytes())?;
@@ -74,6 +76,7 @@ mod tests {
         let args = Args {
             downloads: subs_dir.path().to_string_lossy().to_string(),
             history: history_file_name.clone(),
+            subscriptions: subs_file_name.clone(),
         };
         let env = Env {
             network: NetworkEnv {
@@ -95,10 +98,7 @@ mod tests {
             },
             file: FileEnv {
                 open: mock_file_open(HashMap::from([
-                    (
-                        subs_file_name.to_string(),
-                        format!("{}/{}", subs_dir.path().to_string_lossy(), subs_file_name),
-                    ),
+                    (subs_file_name.to_string(), subs_file_name),
                     (history_file_name.to_string(), history_file_name),
                 ])),
                 append_line: mock_file_append_line(),
@@ -106,7 +106,7 @@ mod tests {
         };
 
         //when
-        run(subs_file_name, site, &args, env)?;
+        run(site, &args, env)?;
         //then
         drop(subs_dir);
         drop(history_dir);
diff --git a/src/main.rs b/src/main.rs
index 4fcb4d8..324db00 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -6,13 +6,11 @@ use podal::prelude::*;
 
 fn main() -> Result<()> {
     println!("Podal");
-    let subscriptions = "subscriptions.txt";
     let site = "https://www.youtube.com/";
 
     let args = Args::parse();
 
     podal::run(
-        subscriptions,
         site,
         &args,
         podal::Env {
diff --git a/src/params/mod.rs b/src/params/mod.rs
index 10c3199..67f80d2 100644
--- a/src/params/mod.rs
+++ b/src/params/mod.rs
@@ -12,4 +12,9 @@ pub struct Args {
     /// Defaults to "downloaded.txt" located in the downloads directory.
     #[arg(long, default_value = "downloaded.txt")]
     pub history: String,
+
+    /// The name of the subscriptions file.
+    /// Defaults to "subscriptions.txt" located in the downloads directory.
+    #[arg(long, default_value = "subscriptions.txt")]
+    pub subscriptions: String,
 }
diff --git a/src/test_utils.rs b/src/test_utils.rs
index a29fcfa..8f58ea3 100644
--- a/src/test_utils.rs
+++ b/src/test_utils.rs
@@ -7,6 +7,7 @@ use std::{
     sync::mpsc::Sender,
 };
 
+use anyhow::Context;
 use tempfile::{tempdir, TempDir};
 
 use crate::{
@@ -63,10 +64,12 @@ pub fn mock_network_fetch_as_bytes_with_rss_entries(
 pub fn mock_file_open(real_paths: HashMap<String, String>) -> FileOpenFn {
     Box::new(move |path: &str| {
         if let Some(real_path) = real_paths.get(&path.to_string()) {
-            Ok(File::open(real_path)?)
+            Ok(File::open(real_path).with_context(|| {
+                format!("test_utils/mock_file_open: path={path}, real_path={real_path}, path_map=[{:?}]", real_paths)
+            })?)
         } else {
             Err(Error::message(
-                format!("Not implemented: file_open: {}", path).as_str(),
+                format!("Not implemented: test_utils/mock_file_open: {}", path).as_str(),
             ))
         }
     })