diff --git a/changes/bug26101_26102 b/changes/bug26101_26102
new file mode 100644
index 000000000..bc3bc84b2
--- /dev/null
+++ b/changes/bug26101_26102
@@ -0,0 +1,5 @@
+  o Minor bugfixes (test coverage tools):
+    - Update our "cov-diff" script to handle output from the latest
+      version of gcov, and to remove extraneous timestamp information
+      from its output. Fixes bugs 26101 and 26102; bugfix on
+      0.2.5.1-alpha.
\ No newline at end of file
diff --git a/scripts/test/cov-diff b/scripts/test/cov-diff
index ed8874d2d..6179dff63 100755
--- a/scripts/test/cov-diff
+++ b/scripts/test/cov-diff
@@ -10,12 +10,12 @@ DIRB="$2"
 for B in $DIRB/*; do
   A=$DIRA/`basename $B`
   if [ -f $A ]; then
-      perl -pe 's/^\s*\!*\d+:/        1:/; s/^([^:]+:)[\d\s]+:/$1/; s/^ *-:(Runs|Programs):.*//;' "$A" > "$A.tmp"
+      perl -pe 's/^\s*\!*\d+(\*?):/        1$1:/; s/^([^:]+:)[\d\s]+:/$1/; s/^ *-:(Runs|Programs):.*//;' "$A" > "$A.tmp"
   else
       cat /dev/null > "$A.tmp"
   fi
-  perl -pe 's/^\s*\!*\d+:/        1:/; s/^([^:]+:)[\d\s]+:/$1/; s/^ *-:(Runs|Programs):.*//;' "$B" > "$B.tmp"
-  diff -u "$A.tmp" "$B.tmp"
+  perl -pe 's/^\s*\!*\d+(\*?):/        1$1:/; s/^([^:]+:)[\d\s]+:/$1/; s/^ *-:(Runs|Programs):.*//;' "$B" > "$B.tmp"
+  diff -u "$A.tmp" "$B.tmp" |perl -pe 's/^((?:\+\+\+|---)(?:.*tmp))\s+.*/$1/;'
   rm "$A.tmp" "$B.tmp"
 done