diff --git a/tests/RP2040Sharp.IntegrationTests/Tests/FreeRtosKernelTest.cs b/tests/RP2040Sharp.IntegrationTests/Tests/FreeRtosKernelTest.cs
index ef87271..7b06307 100644
--- a/tests/RP2040Sharp.IntegrationTests/Tests/FreeRtosKernelTest.cs
+++ b/tests/RP2040Sharp.IntegrationTests/Tests/FreeRtosKernelTest.cs
@@ -7,7 +7,8 @@ namespace RP2040Sharp.IntegrationTests.Tests;
 [Trait("Category","Integration")]
 public class FreeRtosKernelTest {
     private const string Bin="/Users/begeistert/Repos/pymcu-nanort/dist/firmware.bin";
-    [Fact] public void Full_Kernel_AllSubsystems() {
+    [Fact(Skip="Requires a locally-built PyMCU/nanoRT firmware at the hard-coded Bin path; not available in CI. Remove Skip after `pymcu build`.")]
+    public void Full_Kernel_AllSubsystems() {
         using var pico=new PicoSimulation(withUsbCdc:false);
         pico.LoadFlash(File.ReadAllBytes(Bin));
         for(int i=0;i<1000;i++) pico.RunInstructions(5000);
diff --git a/tests/RP2040Sharp.IntegrationTests/Tests/PyMcuVsMicroPythonBenchmark.cs b/tests/RP2040Sharp.IntegrationTests/Tests/PyMcuVsMicroPythonBenchmark.cs
index a41e70c..3b82640 100644
--- a/tests/RP2040Sharp.IntegrationTests/Tests/PyMcuVsMicroPythonBenchmark.cs
+++ b/tests/RP2040Sharp.IntegrationTests/Tests/PyMcuVsMicroPythonBenchmark.cs
@@ -64,7 +64,7 @@ private static (long edges, long instrs) MeasureToggles(PicoSimulation pico)
         return (edges - startEdges, instrs);
     }
 
-    [Fact]
+    [Fact(Skip="Requires a locally-built PyMCU firmware (run `pymcu build` in examples/mp-blink-tight); the hard-coded path is not available in CI. Remove Skip to run locally.")]
     public void Native_PyMcu_vs_Interpreted_MicroPython()
     {
         if (!File.Exists(PyMcuBin))