diff --git a/moz-webgpu-cts/src/main.rs b/moz-webgpu-cts/src/main.rs
index 1cffaa9..6271719 100644
--- a/moz-webgpu-cts/src/main.rs
+++ b/moz-webgpu-cts/src/main.rs
@@ -29,7 +29,7 @@ use std::{
 use crate::wpt::path::Browser;
 use camino::Utf8PathBuf;
 use clap::{Parser, ValueEnum};
-use enumset::EnumSetType;
+use enumset::{EnumSet, EnumSetType};
 use format::lazy_format;
 use indexmap::{IndexMap, IndexSet};
 use itertools::Itertools;
@@ -84,9 +84,10 @@ enum Subcommand {
         /// The heuristic for resolving differences between current metadata and processed reports.
         #[clap(long, default_value = "reset-contradictory")]
         preset: UpdateExpectedPreset,
-        /// The `implementation-status` that changes should be applied to.
-        #[clap(value_enum, long, default_value_t = ImplementationStatus::Backlog)]
-        implementation_status: ImplementationStatus,
+        /// `implementation-status`es that changes should be applied to. If not specified, defaults
+        /// to `implementing`.
+        #[clap(value_enum, long)]
+        implementation_status: Vec<ImplementationStatus>,
     },
     /// Parse test metadata, apply automated fixups, and re-emit it in normalized form.
     #[clap(name = "fixup", alias = "fmt")]
@@ -291,16 +292,23 @@ fn run(cli: Cli) -> ExitCode {
             exec_report_spec,
             preset,
             implementation_status,
-        } => match process_reports(
-            browser,
-            &checkout,
-            exec_report_spec,
-            preset.into(),
-            implementation_status,
-        ) {
-            Ok(()) => ExitCode::SUCCESS,
-            Err(AlreadyReportedToCommandline) => ExitCode::FAILURE,
-        },
+        } => {
+            let implementation_status = if implementation_status.is_empty() {
+                ImplementationStatus::default().into()
+            } else {
+                EnumSet::from_iter(implementation_status)
+            };
+            match process_reports(
+                browser,
+                &checkout,
+                exec_report_spec,
+                preset.into(),
+                implementation_status,
+            ) {
+                Ok(()) => ExitCode::SUCCESS,
+                Err(AlreadyReportedToCommandline) => ExitCode::FAILURE,
+            }
+        }
         Subcommand::Fixup => {
             log::info!("fixing up metadata in-place…");
             let err_found = read_and_parse_all_metadata(browser, &checkout)
@@ -1280,7 +1288,7 @@ fn process_reports(
     checkout: &Path,
     exec_report_spec: ExecReportSpec,
     preset: process_reports::ReportProcessingPreset,
-    implementation_status: ImplementationStatus,
+    implementation_status: EnumSet<ImplementationStatus>,
 ) -> Result<(), AlreadyReportedToCommandline> {
     let exec_report_paths = exec_report_spec.paths()?;
 
diff --git a/moz-webgpu-cts/src/process_reports.rs b/moz-webgpu-cts/src/process_reports.rs
index 0ea71e6..029b83d 100644
--- a/moz-webgpu-cts/src/process_reports.rs
+++ b/moz-webgpu-cts/src/process_reports.rs
@@ -9,7 +9,7 @@ use std::{
 };
 
 use camino::Utf8PathBuf;
-use enumset::EnumSetType;
+use enumset::{EnumSet, EnumSetType};
 use format::lazy_format;
 use indexmap::IndexMap;
 use miette::{IntoDiagnostic, Report, WrapErr};
@@ -53,7 +53,7 @@ pub(crate) struct ProcessReportsArgs<'a> {
     pub checkout: &'a Path,
     pub exec_report_paths: Vec<PathBuf>,
     pub preset: ReportProcessingPreset,
-    pub implementation_status: ImplementationStatus,
+    pub implementation_status: EnumSet<ImplementationStatus>,
     pub meta_files_by_path: IndexMap<Arc<PathBuf>, File>,
 }
 
@@ -110,7 +110,7 @@ fn reconcile<Out>(
     meta_props: &mut TestProps<Out>,
     reported: BTreeMap<Platform, BTreeMap<BuildProfile, Expected<Out>>>,
     preset: ReportProcessingPreset,
-    implementation_status_filter: ImplementationStatus,
+    implementation_status_filter: EnumSet<ImplementationStatus>,
 ) where
     Out: Debug + Default + EnumSetType,
 {
diff --git a/moz-webgpu-cts/src/wpt/metadata.rs b/moz-webgpu-cts/src/wpt/metadata.rs
index a710b96..818f252 100644
--- a/moz-webgpu-cts/src/wpt/metadata.rs
+++ b/moz-webgpu-cts/src/wpt/metadata.rs
@@ -567,7 +567,7 @@ fn format_file_properties(props: &FileProps) -> impl Display + '_ {
     })
 }
 
-#[derive(Clone, Copy, Debug, Default, Eq, PartialEq, Serialize, ValueEnum)]
+#[derive(Debug, Default, EnumSetType, Serialize, ValueEnum)]
 pub enum ImplementationStatus {
     /// Indicates that functionality governing test(s) is implemented or currently being
     /// implemented, and generally expected to conform to tests.