diff --git a/src/Report/Html/Renderer/File.php b/src/Report/Html/Renderer/File.php
index bfb315e46..31fb4d338 100644
--- a/src/Report/Html/Renderer/File.php
+++ b/src/Report/Html/Renderer/File.php
@@ -243,8 +243,8 @@ private function renderTraitOrClassItems(array $items, Template $template, Templ
                     $item['executablePaths']
                 )->asString();
             } else {
-                $numClasses                      = 'n/a';
-                $numTestedClasses                = 'n/a';
+                $numClasses                      = 0;
+                $numTestedClasses                = 0;
                 $linesExecutedPercentAsString    = 'n/a';
                 $branchesExecutedPercentAsString = 'n/a';
                 $pathsExecutedPercentAsString    = 'n/a';