diff --git a/script/test_build_components.py b/script/test_build_components.py
index 4df70c6887..2644d09938 100755
--- a/script/test_build_components.py
+++ b/script/test_build_components.py
@@ -351,13 +351,16 @@ def run_grouped_component_tests(
             if platform_filter and not platform.startswith(platform_filter):
                 continue
 
-            # Only group if component has valid bus configs
+            # Create signature for this component's bus configuration
+            # Components with no buses get a signature of "no_buses" so they can be grouped together
             if buses:
                 signature = create_grouping_signature({platform: buses}, platform)
-                # Only add to grouped_components if signature is non-empty
-                # (empty means component has no valid bus configurations)
-                if signature:
-                    grouped_components[(platform, signature)].append(component)
+            else:
+                signature = "no_buses"
+
+            # Add to grouped components (including those with no buses)
+            if signature:
+                grouped_components[(platform, signature)].append(component)
 
     # Print detailed grouping plan
     print("\nGrouping Plan:")