diff --git a/.github/workflows/pr.yaml b/.github/workflows/pr.yaml
index cc4b17fa..412ff602 100644
--- a/.github/workflows/pr.yaml
+++ b/.github/workflows/pr.yaml
@@ -758,7 +758,12 @@ jobs:
           threshold=${CODECOV_MINIMUM:-90}
           matched_count=0
 
-          while read -r line; do
+          # IFS= so `read` preserves leading whitespace — otherwise ReportGenerator's
+          # indented per-class rows are un-indented before the `^[^ ]` module filter
+          # sees them and get gated as if they were assemblies (#386). Only bites once
+          # test assemblies are instrumented (IncludeTestAssembly); Stage 2's pwsh
+          # parser is unaffected.
+          while IFS= read -r line; do
             # Match lines with module names and percentages. The percent
             # capture is the LAST %-suffixed number on the line, matching
             # Stage 2's behavior — ReportGenerator Summary.txt rows often