diff --git a/farmbot_firmware/test/farmbot_firmware/command_test.exs b/farmbot_firmware/test/farmbot_firmware/command_test.exs
index 2a986a4d..e36b6ae9 100644
--- a/farmbot_firmware/test/farmbot_firmware/command_test.exs
+++ b/farmbot_firmware/test/farmbot_firmware/command_test.exs
@@ -6,6 +6,7 @@ defmodule FarmbotFirmware.CommandTest do
   import ExUnit.CaptureLog
   @subject FarmbotFirmware.Command
 
+  @tag :capture_log
   test "command() runs RPCs" do
     arg = [transport: FarmbotFirmware.StubTransport]
     {:ok, pid} = FarmbotFirmware.start_link(arg, [])
@@ -19,6 +20,7 @@ defmodule FarmbotFirmware.CommandTest do
     assert :ok == FarmbotFirmware.command(pid, cmd)
   end
 
+  @tag :capture_log
   test "command() refuses to run RPCs in :boot state" do
     arg = [transport: FarmbotFirmware.StubTransport]
     {:ok, pid} = FarmbotFirmware.start_link(arg, [])
diff --git a/farmbot_firmware/test/farmbot_firmware/transports/uart_transport_test.exs b/farmbot_firmware/test/farmbot_firmware/transports/uart_transport_test.exs
index 50678f5c..8238359b 100644
--- a/farmbot_firmware/test/farmbot_firmware/transports/uart_transport_test.exs
+++ b/farmbot_firmware/test/farmbot_firmware/transports/uart_transport_test.exs
@@ -4,6 +4,7 @@ defmodule FarmbotFirmware.UARTTransportTest do
   doctest FarmbotFirmware.UARTTransport
   alias FarmbotFirmware.{UartDefaultAdapter, UARTTransport}
   setup :verify_on_exit!
+  import ExUnit.CaptureLog
 
   test "UARTTransport.init/1" do
     expect(UartDefaultAdapter, :start_link, fn ->
@@ -61,15 +62,22 @@ defmodule FarmbotFirmware.UARTTransportTest do
       fake_opts
     end)
 
+    error = "Simulated UART failure. This is OK"
+
     expect(UartDefaultAdapter, :open, fn _, _, _ ->
-      {:error, "Simulated UART failure. This is OK"}
+      {:error, error}
     end)
 
-    {:noreply, state2, retry_timeout} =
-      UARTTransport.handle_info(:timeout, state)
+    logs =
+      capture_log(fn ->
+        {:noreply, state2, retry_timeout} =
+          UARTTransport.handle_info(:timeout, state)
 
-    assert retry_timeout == 5000
-    assert state.open == state2.open
+        assert retry_timeout == 5000
+        assert state.open == state2.open
+      end)
+
+    assert logs =~ error
   end
 
   test "UARTTransport handles `Circuits-UART` speecific errors" do
diff --git a/farmbot_firmware/test/farmbot_firmware_test.exs b/farmbot_firmware/test/farmbot_firmware_test.exs
index 04af88bf..c0778fda 100644
--- a/farmbot_firmware/test/farmbot_firmware_test.exs
+++ b/farmbot_firmware/test/farmbot_firmware_test.exs
@@ -19,6 +19,7 @@ defmodule FarmbotFirmwareTest do
     pid
   end
 
+  @tag :capture_log
   test "various reports" do
     pid = firmware_server()
 
@@ -63,6 +64,7 @@ defmodule FarmbotFirmwareTest do
     Process.sleep(1000)
   end
 
+  @tag :capture_log
   test "various command()s" do
     pid = firmware_server()
 
diff --git a/farmbot_firmware/test/param_test.exs b/farmbot_firmware/test/param_test.exs
index 8b6357ff..47ff100e 100644
--- a/farmbot_firmware/test/param_test.exs
+++ b/farmbot_firmware/test/param_test.exs
@@ -1,6 +1,7 @@
 defmodule FarmbotFirmware.ParamTest do
   use ExUnit.Case
   alias FarmbotFirmware.Param
+  import ExUnit.CaptureLog
 
   test "to_human()" do
     float_value = 1.23
@@ -215,6 +216,11 @@ defmodule FarmbotFirmware.ParamTest do
   end
 
   test "Handling of uknown parameters" do
-    assert :unknown_parameter == Param.decode(-999)
+    log =
+      capture_log(fn ->
+        assert :unknown_parameter == Param.decode(-999)
+      end)
+
+    assert log =~ "unknown firmware parameter: -999"
   end
 end