diff --git a/experimental/src/compute/lexer.rs b/experimental/src/compute/lexer.rs
index 4585e138f..f26da9fcd 100644
--- a/experimental/src/compute/lexer.rs
+++ b/experimental/src/compute/lexer.rs
@@ -1,4 +1,4 @@
-use log::{debug, error, trace};
+use log::{error, trace};
 use std::str;
 
 pub type Spanned<Tok, Loc, Error> = Result<(Loc, Tok, Loc), Error>;
@@ -155,7 +155,7 @@ impl<'input> Iterator for Lexer<'input> {
     }
 }
 
-mod Test {
+mod test {
     use super::*;
 
     fn init() {
diff --git a/experimental/src/compute/mod.rs b/experimental/src/compute/mod.rs
index b3717da75..561ac1322 100644
--- a/experimental/src/compute/mod.rs
+++ b/experimental/src/compute/mod.rs
@@ -98,7 +98,7 @@ impl<'a> Parser<'a> {
     }
 }
 
-mod Test {
+mod test {
     use super::*;
     use log::info;
     use std::collections::HashMap;
diff --git a/experimental/src/compute/threshold.rs b/experimental/src/compute/threshold.rs
index 318a692c8..2eec48d16 100644
--- a/experimental/src/compute/threshold.rs
+++ b/experimental/src/compute/threshold.rs
@@ -116,7 +116,7 @@ impl Threshold {
     }
 }
 
-mod Test {
+mod test {
     use super::*;
 
     #[test]
diff --git a/experimental/src/generic/mod.rs b/experimental/src/generic/mod.rs
index ac7e56dce..5723409a1 100644
--- a/experimental/src/generic/mod.rs
+++ b/experimental/src/generic/mod.rs
@@ -85,9 +85,14 @@ pub struct Collect {
 pub struct Command {
     collect: Collect,
     compute: Compute,
+    #[serde(default = "default_output")]
     pub output: Output,
 }
 
+fn default_output() -> Output {
+    Output::new()
+}
+
 #[derive(Debug)]
 pub struct CmdResult {
     pub status: Status,
@@ -403,7 +408,7 @@ impl Command {
         }
 
         trace!("collect: {:#?}", collect);
-        println!("metrics: {:#?}", metrics);
+        trace!("metrics: {:#?}", metrics);
         let output_formatter = OutputFormatter::new(status, &metrics, &self.output);
         let output = output_formatter.to_string();
         Ok(CmdResult { status, output })