diff --git a/test/common/upstream/least_request_load_balancer_corpus/large_active_request_bias b/test/common/upstream/least_request_load_balancer_corpus/large_active_request_bias
new file mode 100644
index 000000000000..b71dd055c2a7
--- /dev/null
+++ b/test/common/upstream/least_request_load_balancer_corpus/large_active_request_bias
@@ -0,0 +1,19 @@
+zone_aware_load_balancer_test_case {
+  load_balancer_test_case {
+    common_lb_config {
+    }
+    setup_priority_levels {
+      num_hosts_in_priority_level: 59
+      random_bytestring: 9
+    }
+    seed_for_prng: 4
+  }
+  random_bytestring_for_weights: "!A"
+}
+least_request_lb_config {
+  active_request_bias {
+    default_value: 34816
+    runtime_key: "*"
+  }
+}
+random_bytestring_for_requests: "+"
diff --git a/test/common/upstream/least_request_load_balancer_fuzz_test.cc b/test/common/upstream/least_request_load_balancer_fuzz_test.cc
index d6a63c628e34..0047d3377ab7 100644
--- a/test/common/upstream/least_request_load_balancer_fuzz_test.cc
+++ b/test/common/upstream/least_request_load_balancer_fuzz_test.cc
@@ -53,11 +53,22 @@ DEFINE_PROTO_FUZZER(const test::common::upstream::LeastRequestLoadBalancerTestCa
                    MaxChoiceCountForTest);
     return;
   }
-  // Validate the correctness of the Slow-Start config values.
-  if (input.has_least_request_lb_config() &&
-      input.least_request_lb_config().has_slow_start_config()) {
-    if (!ZoneAwareLoadBalancerFuzzBase::validateSlowStart(
-            input.least_request_lb_config().slow_start_config())) {
+  if (input.has_least_request_lb_config()) {
+    const auto& least_request_lb_config = input.least_request_lb_config();
+    // Validate the correctness of the Slow-Start config values.
+    if (least_request_lb_config.has_slow_start_config() &&
+        !ZoneAwareLoadBalancerFuzzBase::validateSlowStart(
+            least_request_lb_config.slow_start_config())) {
+      return;
+    }
+    // Validate that the active_request_bias is not too large (or else it will
+    // effectively zero all the weights).
+    if (least_request_lb_config.has_active_request_bias() &&
+        least_request_lb_config.active_request_bias().default_value() > 25) {
+      ENVOY_LOG_MISC(debug,
+                     "active_request_bias default_value in the least-request config is too high "
+                     "({} > 25), skipping test as the config is invalid",
+                     least_request_lb_config.active_request_bias().default_value());
       return;
     }
   }