diff --git a/src/hydra-queue-runner/build-result.cc b/src/hydra-queue-runner/build-result.cc
index aa98acbb5..e4ff3bf77 100644
--- a/src/hydra-queue-runner/build-result.cc
+++ b/src/hydra-queue-runner/build-result.cc
@@ -143,7 +143,7 @@ BuildOutput getBuildOutput(
         for (auto & line : tokenizeString<Strings>(file->second.contents.value(), "\n")) {
             auto fields = tokenizeString<std::vector<std::string>>(line);
             if (fields.size() < 2) continue;
-            if (!std::regex_match(fields[0], std::regex("[a-zA-Z0-9._-]+")))
+            if (!std::regex_match(fields[0], std::regex(R"([a-zA-Z0-9._%\-\[\]:]+)")))
                 continue;
             BuildMetric metric;
             metric.name = fields[0];
diff --git a/t/Hydra/Plugin/RunCommand/json.t b/t/Hydra/Plugin/RunCommand/json.t
index 7bd8484d3..ac21d5404 100644
--- a/t/Hydra/Plugin/RunCommand/json.t
+++ b/t/Hydra/Plugin/RunCommand/json.t
@@ -80,10 +80,12 @@ subtest "Validate the outputs match" => sub {
 };
 
 subtest "Validate the metrics match" => sub {
-    is(scalar(@{$dat->{metrics}}), 2, "There are exactly two metrics");
+    is(scalar(@{$dat->{metrics}}), 3, "There are exactly three metrics");
 
     my ($lineCoverage)  = grep { $_->{name} eq "lineCoverage" } @{$dat->{metrics}};
     my ($maxResident) = grep { $_->{name} eq "maxResident" } @{$dat->{metrics}};
+    my ($test_foo_py) = grep { $_->{name} eq "test_foo.py::best_bar[1]" } @{$dat->{metrics}};
+
 
     subtest "verifying the lineCoverage metric" => sub {
         is($lineCoverage->{name}, "lineCoverage", "The name matches.");
@@ -96,6 +98,12 @@ subtest "Validate the metrics match" => sub {
         is($maxResident->{value}, 27, "The value matches.");
         is($maxResident->{unit}, "KiB", "The unit matches.");
     };
+
+    subtest "verifying the test_foo_py metric" => sub {
+        is($test_foo_py->{name}, "test_foo.py::best_bar[1]", "The name matches.");
+        is($test_foo_py->{value}, 3.1, "The value matches.");
+        is($test_foo_py->{unit}, "s", "The unit matches.");
+    };
 };
 
 subtest "Validate the products match" => sub {
diff --git a/t/jobs/runcommand.nix b/t/jobs/runcommand.nix
index f4b8b0fc7..1c5eaac4e 100644
--- a/t/jobs/runcommand.nix
+++ b/t/jobs/runcommand.nix
@@ -19,6 +19,7 @@ with import ./config.nix;
             mkdir -p "$(dirname "$metrics")"
             echo "lineCoverage 18 %" >> "$metrics"
             echo "maxResident 27 KiB" >> "$metrics"
+            echo "test_foo.py::best_bar[1] 3.1 s" >> "$metrics"
           ''
         )
       ];