diff --git a/lib/galaxy/job_metrics/instrumenters/hostname.py b/lib/galaxy/job_metrics/instrumenters/hostname.py
index 721fa1aca419..d4d01402a879 100644
--- a/lib/galaxy/job_metrics/instrumenters/hostname.py
+++ b/lib/galaxy/job_metrics/instrumenters/hostname.py
@@ -1,6 +1,7 @@
 """The module describes the ``hostname`` job metrics plugin."""
 
 import logging
+from typing import Any
 
 from . import InstrumentPlugin
 from .. import formatting
@@ -9,8 +10,8 @@
 
 
 class HostnameFormatter(formatting.JobMetricFormatter):
-    def format(self, key, value):
-        return key, value
+    def format(self, key: str, value: Any):
+        return formatting.FormattedMetric(key, value)
 
 
 class HostnamePlugin(InstrumentPlugin):
diff --git a/lib/galaxy/job_metrics/instrumenters/meminfo.py b/lib/galaxy/job_metrics/instrumenters/meminfo.py
index 80e523d97308..a6ec359e730a 100644
--- a/lib/galaxy/job_metrics/instrumenters/meminfo.py
+++ b/lib/galaxy/job_metrics/instrumenters/meminfo.py
@@ -1,6 +1,7 @@
 """The module describes the ``meminfo`` job metrics plugin."""
 
 import re
+from typing import Any
 
 from galaxy import util
 from . import InstrumentPlugin
@@ -14,9 +15,9 @@
 
 
 class MemInfoFormatter(formatting.JobMetricFormatter):
-    def format(self, key, value):
+    def format(self, key: str, value: Any):
         title = MEMINFO_TITLES.get(key, key)
-        return title, util.nice_size(value * 1000)  # kB = *1000, KB = *1024 - wikipedia
+        return formatting.FormattedMetric(title, util.nice_size(value * 1000))  # kB = *1000, KB = *1024 - wikipedia
 
 
 class MemInfoPlugin(InstrumentPlugin):