diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index fe3e6df52..f288b0d9a 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -91,6 +91,12 @@ All errors should be handled in one of these ways:
 - With `.log_err().ok()`.
 - Bubbled up with `?`.
 
+`backtrace` feature is enabled for `anyhow` crate
+and `debug = 1` option is set in the test profile.
+This allows to run `RUST_BACKTRACE=1 cargo test`
+and get a backtrace with line numbers in resultified tests
+which return `anyhow::Result`.
+
 ### Logging
 
 For logging, use `info!`, `warn!` and `error!` macros.
diff --git a/Cargo.toml b/Cargo.toml
index c22119833..c0a312c32 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,6 +11,10 @@ panic = 'abort'
 opt-level = 1
 
 [profile.test]
+# Make anyhow `backtrace` feature useful.
+# With `debug = 0` there are no line numbers in the backtrace
+# produced with RUST_BACKTRACE=1.
+debug = 1
 opt-level = 0
 
 # Always optimize dependencies.
@@ -99,6 +103,7 @@ uuid = { version = "1", features = ["serde", "v4"] }
 
 [dev-dependencies]
 ansi_term = "0.12.0"
+anyhow = { version = "1", features = ["backtrace"] } # Enable `backtrace` feature in tests.
 criterion = { version = "0.5.1", features = ["async_tokio"] }
 futures-lite = "2.0.0"
 log = "0.4"