diff --git a/tests/driver_dose/Makefile.ci b/tests/driver_dose/Makefile.ci
index 2eb937ad22..a98193f422 100644
--- a/tests/driver_dose/Makefile.ci
+++ b/tests/driver_dose/Makefile.ci
@@ -4,6 +4,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-mega2560 \
     arduino-nano \
     arduino-uno \
+    atxmega-a3bu-xplained \
     atmega328p \
     atmega328p-xplained-mini \
     bluepill-stm32f030c8 \
diff --git a/tests/gnrc_sixlowpan_frag_minfwd/Makefile.ci b/tests/gnrc_sixlowpan_frag_minfwd/Makefile.ci
index 6d37cd67b1..22951acd27 100644
--- a/tests/gnrc_sixlowpan_frag_minfwd/Makefile.ci
+++ b/tests/gnrc_sixlowpan_frag_minfwd/Makefile.ci
@@ -8,6 +8,8 @@ BOARD_INSUFFICIENT_MEMORY := \
     atmega328p \
     atmega328p-xplained-mini \
     atxmega-a3bu-xplained \
+    blackpill \
+    bluepill \
     bluepill-stm32f030c8 \
     derfmega128 \
     hifive1 \