diff --git a/dev-tools/omdb/src/bin/omdb/oxql.rs b/dev-tools/omdb/src/bin/omdb/oxql.rs
index 4a662e554b8..89ddae9cf2e 100644
--- a/dev-tools/omdb/src/bin/omdb/oxql.rs
+++ b/dev-tools/omdb/src/bin/omdb/oxql.rs
@@ -59,8 +59,7 @@ impl OxqlArgs {
             log.new(slog::o!("component" => "clickhouse-client")),
             opts,
         )
-        .await?;
-        Ok(())
+        .await
     }
 
     /// Resolve the ClickHouse URL to a socket address.
diff --git a/dev-tools/omdb/tests/env.out b/dev-tools/omdb/tests/env.out
index 9c8023f1a12..66a48ab394b 100644
--- a/dev-tools/omdb/tests/env.out
+++ b/dev-tools/omdb/tests/env.out
@@ -447,15 +447,14 @@ Caused by:
     1: builder error: relative URL without a base
     2: relative URL without a base
 =============================================
-EXECUTING COMMAND: omdb ["oxql", "--metrics-db-url", "junk"]
-termination: Exited(2)
+EXECUTING COMMAND: omdb ["oxql", "--clickhouse-url", "junk"]
+termination: Exited(1)
 ---------------------------------------------
 stdout:
 ---------------------------------------------
 stderr:
-error: unexpected argument '--metrics-db-url' found
-
-Usage: omdb oxql [OPTIONS]
+Error: failed parsing URL from command-line or environment variable
 
-For more information, try '--help'.
+Caused by:
+    relative URL without a base
 =============================================
diff --git a/dev-tools/omdb/tests/test_all_output.rs b/dev-tools/omdb/tests/test_all_output.rs
index 041a6ef75dd..d960b7208c2 100644
--- a/dev-tools/omdb/tests/test_all_output.rs
+++ b/dev-tools/omdb/tests/test_all_output.rs
@@ -27,6 +27,10 @@ const CMD_OMDB: &str = env!("CARGO_BIN_EXE_omdb");
 type ControlPlaneTestContext =
     nexus_test_utils::ControlPlaneTestContext<omicron_nexus::Server>;
 
+/// The `oximeter` list-producers command output is not easy to compare as a
+/// string directly because the timing of registrations with both our test
+/// producer and the one nexus registers. But, let's find our test producer
+/// in the list.
 fn assert_oximeter_list_producers_output(output: &str, ox_url: &str) {
     assert!(
         output.contains(format!("Collector ID: {}", OXIMETER_UUID).as_str())
@@ -317,7 +321,7 @@ async fn test_omdb_env_settings(cptestctx: &ControlPlaneTestContext) {
     .await;
 
     // Case: specified in multiple places (command-line argument wins)
-    let args = &["oxql", "--metrics-db-url", "junk"];
+    let args = &["oxql", "--clickhouse-url", "junk"];
     do_run(
         &mut output,
         move |exec| exec.env("OMDB_CLICKHOUSE_URL", &ch_url),
@@ -328,11 +332,6 @@ async fn test_omdb_env_settings(cptestctx: &ControlPlaneTestContext) {
 
     assert_contents("tests/env.out", &output);
 
-    // The `oximeter` list-producers command output is not easy to compare as a
-    // string directly because the timing of registrations with both our test
-    // producer and the one nexus registers. But, let's find our test producer
-    // in the list.
-
     // Oximeter URL
     // Case 1: specified on the command line.
     // Case 2: is covered by the success tests above.