diff --git a/dev/tools/cpan_random_tester.pl b/dev/tools/cpan_random_tester.pl
index 4dbd964a2..cc46243b6 100644
--- a/dev/tools/cpan_random_tester.pl
+++ b/dev/tools/cpan_random_tester.pl
@@ -504,7 +504,14 @@ sub parse_all_module_results {
             ($mod = $dist) =~ s/-[\d.]+$//;   # strip version
             $mod =~ s/-/::/g;                  # Foo-Bar → Foo::Bar
         }
-        next if $seen{$mod}++;
+        # jcpan can install a missing test prerequisite and retry this same
+        # distribution. The later test block is authoritative, so replace an
+        # earlier result instead of preserving a stale first-attempt failure.
+        if ($seen{$mod}) {
+            @results = grep { ($_->{module} // '') ne $mod } @results;
+            delete $seen{$mod};
+        }
+        $seen{$mod} = 1;
 
         my %r = (
             module     => $mod,
@@ -838,7 +845,13 @@ sub finish_streamed_test_block {
         ($mod = $dist) =~ s/-[\d.]+$//;
         $mod =~ s/-/::/g;
     }
-    return if $seen->{$mod}++;
+    # Keep the final result when jcpan retries a distribution after installing
+    # a missing test prerequisite.  The first attempt is not authoritative.
+    if ($seen->{$mod}) {
+        @$results = grep { ($_->{module} // '') ne $mod } @$results;
+        delete $seen->{$mod};
+    }
+    $seen->{$mod} = 1;
 
     my %r = (
         module     => $mod,
diff --git a/dev/tools/tests/cpan_random_tester_parser.t b/dev/tools/tests/cpan_random_tester_parser.t
index 5061e82c0..04550d1b2 100644
--- a/dev/tools/tests/cpan_random_tester_parser.t
+++ b/dev/tools/tests/cpan_random_tester_parser.t
@@ -96,6 +96,45 @@ is_deeply(
     'streaming parser attributes resumed-parent build failure correctly',
 );
 
+my $retry_after_missing_prerequisite = <<'LOG';
+Running test for module 'Emoji::NationalFlag'
+Checksum for /tmp/cpan/sources/authors/id/P/PU/PUNYTAN/Emoji-NationalFlag-0.01.tar.gz ok
+Running Build test for PUNYTAN/Emoji-NationalFlag-0.01.tar.gz
+Can't locate Locale/Country.pm in @INC
+Result: FAIL
+---- Unsatisfied dependencies detected during ----
+    Locale::Country [test_requires]
+Running test for module 'Locale::Country'
+Checksum for /tmp/cpan/sources/authors/id/S/SB/SBECK/Locale-Codes-3.90.tar.gz ok
+Running Build test for PUNYTAN/Emoji-NationalFlag-0.01.tar.gz
+t/basic.t .. ok
+All tests successful.
+Files=2, Tests=3
+Result: PASS
+Build test -- OK
+LOG
+
+my @retry_results = parse_all_module_results($retry_after_missing_prerequisite);
+is_deeply(
+    [map { $_->{module} } @retry_results],
+    ['Emoji::NationalFlag'],
+    'retry replaces the earlier module result',
+);
+is($retry_results[0]{status}, 'PASS', 'successful retry replaces the stale failure');
+is($retry_results[0]{tests}, 3, 'successful retry retains its test count');
+
+my ($retry_log_fh, $retry_log_path) = tempfile();
+print {$retry_log_fh} $retry_after_missing_prerequisite;
+close $retry_log_fh or die "cannot close $retry_log_path: $!";
+my @streamed_retry_results = parse_all_module_results_from_file($retry_log_path);
+is_deeply(
+    [map { $_->{module} } @streamed_retry_results],
+    ['Emoji::NationalFlag'],
+    'streaming parser keeps only the retried module result',
+);
+is($streamed_retry_results[0]{status}, 'PASS',
+    'streaming parser uses the successful retry result');
+
 my %slow = ('Image::ExifTool' => 3600);
 is_deeply(
     [effective_timeout_limits('Image::ExifTool', 120, 600, 300, \%slow)],