diff --git a/Dockerfile.test b/Dockerfile.test
index 802eb3a4..74bee47b 100644
--- a/Dockerfile.test
+++ b/Dockerfile.test
@@ -1,8 +1,15 @@
 FROM python:3.11-slim
 
-# Install PostgreSQL binaries — required by pytest-postgresql to spawn ephemeral test databases
+# System binaries:
+#   - postgresql: pytest-postgresql spawns ephemeral test databases
+#   - poppler-utils: provides pdfinfo / pdftotext, used by
+#     backend/documents_parser/tests/test_summary_pdf_mapper_chain.py's
+#     `_summary_pdf_to_textract_style_pages` helper for layout-preserving
+#     PDF text extraction. Pure-Python alternatives (pymupdf, pypdf) don't
+#     reproduce pdftotext -layout's row-major table cell ordering, which
+#     the Elmhurst Summary extractor depends on.
 RUN apt-get update \
-    && apt-get install -y --no-install-recommends postgresql \
+    && apt-get install -y --no-install-recommends postgresql poppler-utils \
     && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app
diff --git a/backend/documents_parser/tests/test_elmhurst_end_to_end.py b/backend/documents_parser/tests/test_elmhurst_end_to_end.py
index 133c7816..f5b339bb 100644
--- a/backend/documents_parser/tests/test_elmhurst_end_to_end.py
+++ b/backend/documents_parser/tests/test_elmhurst_end_to_end.py
@@ -262,9 +262,15 @@ class TestHeating:
         assert result.sap_heating.main_heating_details[0].heat_emitter_type == 1
 
     def test_emitter_temperature(self, result: EpcPropertyData) -> None:
-        assert (
-            result.sap_heating.main_heating_details[0].emitter_temperature == "Unknown"
-        )
+        # The Elmhurst Summary §14 lodges "Design flow temperature: Unknown"
+        # for this cert. `_elmhurst_emitter_temperature_int` (mapper.py)
+        # converts that to SAP10.2 Table 4d code 1 (high-temp / ≥45 °C —
+        # the worst-case assumption for an unmeasured gas boiler). This
+        # int encoding mirrors the API mapper's `MainHeatingDetail.
+        # emitter_temperature` for cross-mapper field parity; the older
+        # behaviour of surfacing the raw "Unknown" string was replaced
+        # when the int conversion landed.
+        assert result.sap_heating.main_heating_details[0].emitter_temperature == 1
 
     def test_fan_flue_present(self, result: EpcPropertyData) -> None:
         assert result.sap_heating.main_heating_details[0].fan_flue_present is True
diff --git a/datatypes/epc/domain/tests/test_from_rdsap_schema.py b/datatypes/epc/domain/tests/test_from_rdsap_schema.py
index e5ef22c5..e91ca73a 100644
--- a/datatypes/epc/domain/tests/test_from_rdsap_schema.py
+++ b/datatypes/epc/domain/tests/test_from_rdsap_schema.py
@@ -367,7 +367,14 @@ class TestFromRdSapSchema21_0_1:
         assert result.inspection_date == date(2025, 4, 4)
 
     def test_total_floor_area(self, result: EpcPropertyData) -> None:
-        assert result.total_floor_area_m2 == 55.0
+        # Slice 95 (commit f502db8c) changed the API mapper to compute
+        # `total_floor_area_m2` from the precise sum of per-bp
+        # `sap_floor_dimensions[*].total_floor_area` (here: 45.82, a
+        # single ground-floor dimension) rather than the lodged scalar
+        # (here: 55, an integer-rounded display value that doesn't
+        # match the per-bp geometry in this synthetic fixture). The
+        # worksheet uses per-bp sums and the mapper now mirrors that.
+        assert result.total_floor_area_m2 == 45.82
 
     # --- property flags ---