diff --git a/frontend/src/ts/components/pages/connections/FriendsList.tsx b/frontend/src/ts/components/pages/connections/FriendsList.tsx
index b5a9dbb050a7..29e26d5b61f8 100644
--- a/frontend/src/ts/components/pages/connections/FriendsList.tsx
+++ b/frontend/src/ts/components/pages/connections/FriendsList.tsx
@@ -179,17 +179,24 @@ function getColumns({
     defineColumn("completedTests", {
       enableSorting: true,
       header: "tests",
-      cell: (info) => `${info.getValue()}/${info.row.original.startedTests}`,
+      cell: (info) => {
+        const completedTests = info.getValue<number | undefined>();
+        const startedTests = info.row.original.startedTests;
+
+        return `${completedTests ?? 0}/${startedTests ?? 0}`;
+      },
       meta: {
         breakpoint: "lg",
         cellMeta: ({ row }) => {
           const testStats = formatTypingStatsRatio(row);
 
+          if (testStats.completedPercentage === "") {
+            return {};
+          }
+
           return {
             "data-balloon-pos": "up",
-            "aria-label": `${testStats.completedPercentage}% (${
-              testStats.restartRatio
-            } restarts per completed test)`,
+            "aria-label": `${testStats.completedPercentage}% (${testStats.restartRatio} restarts per completed test)`,
           };
         },
       },
diff --git a/frontend/src/ts/utils/misc.ts b/frontend/src/ts/utils/misc.ts
index 6480e38ae000..61ce99a62efe 100644
--- a/frontend/src/ts/utils/misc.ts
+++ b/frontend/src/ts/utils/misc.ts
@@ -715,21 +715,22 @@ export function formatTypingStatsRatio(stats: {
   completedPercentage: string;
   restartRatio: string;
 } {
-  if (
-    stats.completedTests === undefined ||
-    stats.startedTests === undefined ||
-    stats.startedTests === 0
-  ) {
-    return { completedPercentage: "", restartRatio: "" };
+  const startedTests = stats.startedTests ?? 0;
+  const completedTests = stats.completedTests ?? 0;
+
+  if (startedTests === 0) {
+    return { completedPercentage: "0", restartRatio: "0" };
   }
+
+  const abandonedTests = startedTests - completedTests;
+  const restartRatio =
+    completedTests === 0 ? "0" : (abandonedTests / completedTests).toFixed(1);
+
   return {
     completedPercentage: Math.floor(
-      (stats.completedTests / stats.startedTests) * 100,
+      (completedTests / startedTests) * 100,
     ).toString(),
-    restartRatio: (
-      (stats.startedTests - stats.completedTests) /
-      stats.completedTests
-    ).toFixed(1),
+    restartRatio,
   };
 }