diff --git a/esphome/analyze_memory/__init__.py b/esphome/analyze_memory/__init__.py
index b8bbd68df2..07f8df8767 100644
--- a/esphome/analyze_memory/__init__.py
+++ b/esphome/analyze_memory/__init__.py
@@ -2,7 +2,6 @@
 
 from collections import defaultdict
 from dataclasses import dataclass, field
-import json
 import logging
 from pathlib import Path
 import re
@@ -422,28 +421,6 @@ class MemoryAnalyzer:
 
         return "Other Core"
 
-    def to_json(self) -> str:
-        """Export analysis results as JSON."""
-        data = {
-            "components": {
-                name: {
-                    "text": mem.text_size,
-                    "rodata": mem.rodata_size,
-                    "data": mem.data_size,
-                    "bss": mem.bss_size,
-                    "flash_total": mem.flash_total,
-                    "ram_total": mem.ram_total,
-                    "symbol_count": mem.symbol_count,
-                }
-                for name, mem in self.components.items()
-            },
-            "totals": {
-                "flash": sum(c.flash_total for c in self.components.values()),
-                "ram": sum(c.ram_total for c in self.components.values()),
-            },
-        }
-        return json.dumps(data, indent=2)
-
 
 if __name__ == "__main__":
     from .cli import main
diff --git a/script/determine-jobs.py b/script/determine-jobs.py
index d4b46e5474..befd75fb5b 100755
--- a/script/determine-jobs.py
+++ b/script/determine-jobs.py
@@ -54,6 +54,7 @@ from helpers import (
     changed_files,
     get_all_dependencies,
     get_components_from_integration_fixtures,
+    parse_test_filename,
     root_path,
 )
 
@@ -335,11 +336,8 @@ def detect_memory_impact_config(
         # Check if component has tests for any preferred platform
         available_platforms = []
         for test_file in test_files:
-            parts = test_file.stem.split(".")
-            if len(parts) < 2:
-                continue
-            platform = parts[1]
-            if platform in PLATFORM_PREFERENCE:
+            _, platform = parse_test_filename(test_file)
+            if platform != "all" and platform in PLATFORM_PREFERENCE:
                 available_platforms.append(platform)
 
         if not available_platforms:
diff --git a/script/helpers.py b/script/helpers.py
index 61306b9489..85e568dcf8 100644
--- a/script/helpers.py
+++ b/script/helpers.py
@@ -46,6 +46,23 @@ def parse_list_components_output(output: str) -> list[str]:
     return [c.strip() for c in output.strip().split("\n") if c.strip()]
 
 
+def parse_test_filename(test_file: Path) -> tuple[str, str]:
+    """Parse test filename to extract test name and platform.
+
+    Test files follow the naming pattern: test.<platform>.yaml or test-<variant>.<platform>.yaml
+
+    Args:
+        test_file: Path to test file
+
+    Returns:
+        Tuple of (test_name, platform)
+    """
+    parts = test_file.stem.split(".")
+    if len(parts) == 2:
+        return parts[0], parts[1]  # test, platform
+    return parts[0], "all"
+
+
 def styled(color: str | tuple[str, ...], msg: str, reset: bool = True) -> str:
     prefix = "".join(color) if isinstance(color, tuple) else color
     suffix = colorama.Style.RESET_ALL if reset else ""