<p><b>@miri64</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/RIOT-OS/RIOT/pull/11930#discussion_r327817508">tests/gnrc_tcp/Makefile</a>:</p>
<pre style='color:#555'>> +# Shorten default TCP timeouts to speedup testing
+MSL_US ?= 1000000
+TIMEOUT_US ?= 3000000
+
+# Mark Boards with insufficient memory
+#BOARD_INSUFFICIENT_MEMORY := airfy-beacon arduino-duemilanove arduino-leonardo arduino-mega2560 \
+#                             arduino-nano arduino-uno arduino-duemilanove b-l072z-lrwan1 hifive1 \
+#                             hifive1b i-nucleo-lrwan1 lsn50 microbit msb-430 msb-430h nrf51dongle \
+#                             nrf6310 nucleo-f030r8 nucleo-f031k6 nucleo-f042k6 nucleo-f070rb \
+#                             saml10-xpro saml11-xpro stm32f0discovery stm32l0538-disco telosb \
+#                             nucleo-f072rb nucleo-f303k8 nucleo-f334r8 nucleo-l031k6 \
+#                             nucleo-l053r8 mega-xplained waspmote-pro wsn430-v1_3b wsn430-v1_4 \
+#                             yunjia-nrf51822 z1 thingy52
+
+# unsupported by ethos: chronos, hamilton, ruuvitag
+#BOARD_BLACKLIST := chronos hamilton ruuvitag
</pre>
<p>Would have been surprised if those changed, however you forgot the <a href="https://ci.riot-os.org/RIOT-OS/RIOT/11930/020a8a7a3ebbd296650fbdc7803d8ebf50315964/output/compile/tests/gnrc_tcp/thingy52:gnu.txt" rel="nofollow">thingy52</a> (update comment accordingly):</p>
⬇️ Suggested change
<pre style="color: #555">-#BOARD_BLACKLIST := chronos hamilton ruuvitag
+BOARD_BLACKLIST := chronos hamilton ruuvitag thingy52
</pre>


<hr>

<p>In <a href="https://github.com/RIOT-OS/RIOT/pull/11930#discussion_r327819176">tests/gnrc_tcp/Makefile</a>:</p>
<pre style='color:#555'>> +BOARD ?= native
+TAP ?= tap0
+
+# Shorten default TCP timeouts to speedup testing
+MSL_US ?= 1000000
+TIMEOUT_US ?= 3000000
+
+# Mark Boards with insufficient memory
+#BOARD_INSUFFICIENT_MEMORY := airfy-beacon arduino-duemilanove arduino-leonardo arduino-mega2560 \
+#                             arduino-nano arduino-uno arduino-duemilanove b-l072z-lrwan1 hifive1 \
+#                             hifive1b i-nucleo-lrwan1 lsn50 microbit msb-430 msb-430h nrf51dongle \
+#                             nrf6310 nucleo-f030r8 nucleo-f031k6 nucleo-f042k6 nucleo-f070rb \
+#                             saml10-xpro saml11-xpro stm32f0discovery stm32l0538-disco telosb \
+#                             nucleo-f072rb nucleo-f303k8 nucleo-f334r8 nucleo-l031k6 \
+#                             nucleo-l053r8 mega-xplained waspmote-pro wsn430-v1_3b wsn430-v1_4 \
+#                             yunjia-nrf51822 z1 thingy52
</pre>
<p>Here you go:</p>
<div class="highlight highlight-source-makefile"><pre><span class="pl-smi">BOARDS_INSUFFICIENT_MEMORY</span> := arduino-duemilanove arduino-leonardo <span class="pl-cce">\</span>
                              arduino-mega2560 arduino-nano arduino-uno <span class="pl-cce">\</span>
                              hifive1 hifive1b i-nucleo-lrwan1 mega-xplained <span class="pl-cce">\</span>
                              msb-430 msb-430h nucleo-f030r8 nucleo-f031k6 <span class="pl-cce">\</span>
                              nucleo-f042k6 nucleo-f070rb nucleo-f072rb <span class="pl-cce">\</span>
                              nucleo-f303k8  nucleo-f334r8 nucleo-l031k6 <span class="pl-cce">\</span>
                              nucleo-l053r8 saml10-xpro saml11-xpro <span class="pl-cce">\</span>
                              stm32f0discovery stm32l0538-disco telosb <span class="pl-cce">\</span>
                              waspmote-pro wsn430-v1_3b wsn430-v1_4 z1</pre></div>

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