diff --git a/.gitea/scripts/bats-coverage.sh b/.gitea/scripts/bats-coverage.sh
index b1226bc..7b552b9 100755
--- a/.gitea/scripts/bats-coverage.sh
+++ b/.gitea/scripts/bats-coverage.sh
@@ -1,21 +1,35 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-REPORT_DIR="${1:-}"
+COVERAGE_VOLUME="${2:+${1:-}}"
+REPORT_DIR="${2:-${1:-}}"
 
 [ -n "$REPORT_DIR" ] || { echo "ERROR: report directory required" >&2; exit 1; }
 
 COVERAGE_DIR="$REPORT_DIR/coverage"
 
-echo "DEBUG[bats-coverage]: CWD=$(pwd)" >&2
-echo "DEBUG[bats-coverage]: coverage dir exists? $([ -d coverage ] && echo YES || echo NO)" >&2
-
-if [ -d coverage ]; then
-  echo "DEBUG[bats-coverage]: files in coverage/: $(ls coverage/ 2>/dev/null | wc -l)" >&2
-  echo "DEBUG[bats-coverage]: coverage/index.html exists? $([ -f coverage/index.html ] && echo YES || echo NO)" >&2
-  mkdir -p "$COVERAGE_DIR"
-  cp -a coverage/. "$COVERAGE_DIR/"
-  echo "DEBUG[bats-coverage]: copied to $COVERAGE_DIR" >&2
+if [ -n "$COVERAGE_VOLUME" ]; then
+  echo "DEBUG[bats-coverage]: OLD convention — extracting from volume '$1' to '$REPORT_DIR'" >&2
+  if docker run --rm -v "$COVERAGE_VOLUME":/data alpine sh -c '
+    [ -d /data/coverage ] && ls -A /data/coverage | grep -q .
+  ' 2>/dev/null; then
+    echo "DEBUG[bats-coverage]: coverage found in volume $COVERAGE_VOLUME" >&2
+    mkdir -p "$COVERAGE_DIR"
+    docker run --rm -v "$COVERAGE_VOLUME":/data alpine tar c -C /data/coverage . | tar x -C "$COVERAGE_DIR"
+    echo "DEBUG[bats-coverage]: extracted from volume to $COVERAGE_DIR" >&2
+  else
+    echo "DEBUG[bats-coverage]: no coverage in volume $COVERAGE_VOLUME" >&2
+  fi
+else
+  echo "DEBUG[bats-coverage]: NEW convention — copying from ./coverage/ to '$REPORT_DIR'" >&2
+  echo "DEBUG[bats-coverage]: coverage dir exists? $([ -d coverage ] && echo YES || echo NO)" >&2
+  if [ -d coverage ]; then
+    echo "DEBUG[bats-coverage]: files in coverage/: $(ls coverage/ 2>/dev/null | wc -l)" >&2
+    echo "DEBUG[bats-coverage]: coverage/index.html exists? $([ -f coverage/index.html ] && echo YES || echo NO)" >&2
+    mkdir -p "$COVERAGE_DIR"
+    cp -a coverage/. "$COVERAGE_DIR/"
+    echo "DEBUG[bats-coverage]: copied to $COVERAGE_DIR" >&2
+  fi
 fi
 
 echo "DEBUG[bats-coverage]: target $COVERAGE_DIR/index.html exists? $([ -f "$COVERAGE_DIR/index.html" ] && echo YES || echo NO)" >&2