diff --git a/src/Testing/Wolverine.ComplianceTests/Compliance/TransportCompliance.cs b/src/Testing/Wolverine.ComplianceTests/Compliance/TransportCompliance.cs
index d2072c5cf..57bb57d70 100644
--- a/src/Testing/Wolverine.ComplianceTests/Compliance/TransportCompliance.cs
+++ b/src/Testing/Wolverine.ComplianceTests/Compliance/TransportCompliance.cs
@@ -578,7 +578,7 @@ public virtual async Task will_requeue_and_increment_attempts()
     }
 
     [Fact]
-    public async Task can_schedule_retry()
+    public virtual async Task can_schedule_retry()
     {
         throwOnAttempt<BadImageFormatException>(1);
 
diff --git a/src/Transports/Pulsar/Wolverine.Pulsar.Tests/InlinePulsarTransportComplianceTests.cs b/src/Transports/Pulsar/Wolverine.Pulsar.Tests/InlinePulsarTransportComplianceTests.cs
index e1e5d2441..48c79d54c 100644
--- a/src/Transports/Pulsar/Wolverine.Pulsar.Tests/InlinePulsarTransportComplianceTests.cs
+++ b/src/Transports/Pulsar/Wolverine.Pulsar.Tests/InlinePulsarTransportComplianceTests.cs
@@ -40,5 +40,22 @@ public override void BeforeEach()
 }
 
 [Collection("acceptance")]
-[Trait("Category", "Flaky")]
-public class InlinePulsarTransportComplianceTests : TransportCompliance<InlinePulsarTransportFixture>;
\ No newline at end of file
+public class InlinePulsarTransportComplianceTests : TransportCompliance<InlinePulsarTransportFixture>
+{
+    // GH-3763. These four are not flaky -- they fail deterministically, every run, in all three Pulsar
+    // compliance fixtures, with "No ending activity detected" / "Expected ending activity was not
+    // detected". They are the requeue, retry-scheduling and dead-letter behaviours the transport has not
+    // implemented. Skipping just these restores the other 55 tests in this file's three fixtures, which
+    // pass; the whole classes used to be excluded for them. See GH-3797.
+    [Fact(Skip = "Pulsar does not implement this compliance behaviour yet -- see GH-3797. Skipped rather than tagged Flaky: it fails deterministically, on every run, alone or in a suite.")]
+    public override Task will_requeue_and_increment_attempts() => Task.CompletedTask;
+
+    [Fact(Skip = "Pulsar does not implement this compliance behaviour yet -- see GH-3797. Skipped rather than tagged Flaky: it fails deterministically, on every run, alone or in a suite.")]
+    public override Task can_schedule_retry() => Task.CompletedTask;
+
+    [Fact(Skip = "Pulsar does not implement this compliance behaviour yet -- see GH-3797. Skipped rather than tagged Flaky: it fails deterministically, on every run, alone or in a suite.")]
+    public override Task will_move_to_dead_letter_queue_with_exception_match() => Task.CompletedTask;
+
+    [Fact(Skip = "Pulsar does not implement this compliance behaviour yet -- see GH-3797. Skipped rather than tagged Flaky: it fails deterministically, on every run, alone or in a suite.")]
+    public override Task will_move_to_dead_letter_queue_without_any_exception_match() => Task.CompletedTask;
+}
diff --git a/src/Transports/Pulsar/Wolverine.Pulsar.Tests/PulsarTransportComplianceTests.cs b/src/Transports/Pulsar/Wolverine.Pulsar.Tests/PulsarTransportComplianceTests.cs
index f8acf8ffc..59e8acb20 100644
--- a/src/Transports/Pulsar/Wolverine.Pulsar.Tests/PulsarTransportComplianceTests.cs
+++ b/src/Transports/Pulsar/Wolverine.Pulsar.Tests/PulsarTransportComplianceTests.cs
@@ -43,5 +43,22 @@ public override void BeforeEach()
 }
 
 [Collection("acceptance")]
-[Trait("Category", "Flaky")]
-public class PulsarTransportComplianceTests : TransportCompliance<PulsarTransportFixture>;
\ No newline at end of file
+public class PulsarTransportComplianceTests : TransportCompliance<PulsarTransportFixture>
+{
+    // GH-3763. These four are not flaky -- they fail deterministically, every run, in all three Pulsar
+    // compliance fixtures, with "No ending activity detected" / "Expected ending activity was not
+    // detected". They are the requeue, retry-scheduling and dead-letter behaviours the transport has not
+    // implemented. Skipping just these restores the other 55 tests in this file's three fixtures, which
+    // pass; the whole classes used to be excluded for them. See GH-3797.
+    [Fact(Skip = "Pulsar does not implement this compliance behaviour yet -- see GH-3797. Skipped rather than tagged Flaky: it fails deterministically, on every run, alone or in a suite.")]
+    public override Task will_requeue_and_increment_attempts() => Task.CompletedTask;
+
+    [Fact(Skip = "Pulsar does not implement this compliance behaviour yet -- see GH-3797. Skipped rather than tagged Flaky: it fails deterministically, on every run, alone or in a suite.")]
+    public override Task can_schedule_retry() => Task.CompletedTask;
+
+    [Fact(Skip = "Pulsar does not implement this compliance behaviour yet -- see GH-3797. Skipped rather than tagged Flaky: it fails deterministically, on every run, alone or in a suite.")]
+    public override Task will_move_to_dead_letter_queue_with_exception_match() => Task.CompletedTask;
+
+    [Fact(Skip = "Pulsar does not implement this compliance behaviour yet -- see GH-3797. Skipped rather than tagged Flaky: it fails deterministically, on every run, alone or in a suite.")]
+    public override Task will_move_to_dead_letter_queue_without_any_exception_match() => Task.CompletedTask;
+}
diff --git a/src/Transports/Pulsar/Wolverine.Pulsar.Tests/WithCloudEvents.cs b/src/Transports/Pulsar/Wolverine.Pulsar.Tests/WithCloudEvents.cs
index 89f3153e2..a3dc3d543 100644
--- a/src/Transports/Pulsar/Wolverine.Pulsar.Tests/WithCloudEvents.cs
+++ b/src/Transports/Pulsar/Wolverine.Pulsar.Tests/WithCloudEvents.cs
@@ -48,7 +48,6 @@ public override void BeforeEach()
 }
 
 [Collection("acceptance")]
-[Trait("Category", "Flaky")]
 public class with_cloud_events : TransportCompliance<PulsarWithCloudEventsFixture>
 {
     // This test uses ErrorCausingMessage which contains a Dictionary<int, Exception>.
@@ -56,8 +55,20 @@ public class with_cloud_events : TransportCompliance<PulsarWithCloudEventsFixtur
     // which CloudEvents uses internally. The test message's Errors dictionary gets
     // corrupted during serialization, causing the wrong exception type to be thrown.
     // This is a test infrastructure limitation, not a CloudEvents functionality issue.
-    public override Task will_move_to_dead_letter_queue_with_exception_match()
-    {
-        return Task.CompletedTask;
-    }
+    //
+    // Skip rather than an empty body: an override that just returns Task.CompletedTask reports as a
+    // PASS, so the suite counted a test that never ran anything. GH-3763.
+    [Fact(Skip = "CloudEvents' System.Text.Json serialization corrupts ErrorCausingMessage's Dictionary<int, Exception>, so the wrong exception type is thrown -- a test-infrastructure limit, not a CloudEvents defect.")]
+    public override Task will_move_to_dead_letter_queue_with_exception_match() => Task.CompletedTask;
+
+    // GH-3763. Deterministic failures shared with the other two Pulsar compliance fixtures -- the
+    // requeue, retry-scheduling and dead-letter behaviours the transport has not implemented. See GH-3797.
+    [Fact(Skip = "Pulsar does not implement this compliance behaviour yet -- see GH-3797. Skipped rather than tagged Flaky: it fails deterministically, on every run, alone or in a suite.")]
+    public override Task will_requeue_and_increment_attempts() => Task.CompletedTask;
+
+    [Fact(Skip = "Pulsar does not implement this compliance behaviour yet -- see GH-3797. Skipped rather than tagged Flaky: it fails deterministically, on every run, alone or in a suite.")]
+    public override Task can_schedule_retry() => Task.CompletedTask;
+
+    [Fact(Skip = "Pulsar does not implement this compliance behaviour yet -- see GH-3797. Skipped rather than tagged Flaky: it fails deterministically, on every run, alone or in a suite.")]
+    public override Task will_move_to_dead_letter_queue_without_any_exception_match() => Task.CompletedTask;
 }
\ No newline at end of file