diff --git a/examples/gnrc_lorawan/Makefile.ci b/examples/gnrc_lorawan/Makefile.ci
index 7bbdb6c6c1e99..29657667e2f34 100644
--- a/examples/gnrc_lorawan/Makefile.ci
+++ b/examples/gnrc_lorawan/Makefile.ci
@@ -19,5 +19,4 @@ BOARD_INSUFFICIENT_MEMORY := \
     stm32f0discovery \
     telosb \
     weact-g030f6 \
-    z1 \
     #
diff --git a/examples/suit_update/Makefile.ci b/examples/suit_update/Makefile.ci
index 7b95c46880e34..2f30d77a5de26 100644
--- a/examples/suit_update/Makefile.ci
+++ b/examples/suit_update/Makefile.ci
@@ -33,5 +33,4 @@ BOARD_INSUFFICIENT_MEMORY := \
     stk3200 \
     stm32f0discovery \
     telosb \
-    z1 \
     #
diff --git a/tests/drivers/bme680/Makefile.ci b/tests/drivers/bme680/Makefile.ci
index b0a99ae266f96..70b971a9e7d02 100644
--- a/tests/drivers/bme680/Makefile.ci
+++ b/tests/drivers/bme680/Makefile.ci
@@ -5,5 +5,4 @@ BOARD_INSUFFICIENT_MEMORY := \
     msb-430h \
     nucleo-f031k6 \
     telosb \
-    z1 \
     #
diff --git a/tests/net/gnrc_ndp/Makefile.ci b/tests/net/gnrc_ndp/Makefile.ci
index 67b6ed3593e9a..06cd0ec614683 100644
--- a/tests/net/gnrc_ndp/Makefile.ci
+++ b/tests/net/gnrc_ndp/Makefile.ci
@@ -27,5 +27,4 @@ BOARD_INSUFFICIENT_MEMORY := \
     telosb \
     waspmote-pro \
     weact-g030f6 \
-    z1 \
     #
diff --git a/tests/net/gnrc_rpl_p2p/Makefile.ci b/tests/net/gnrc_rpl_p2p/Makefile.ci
index 3a3e0b8405943..79c3e59a58cd4 100644
--- a/tests/net/gnrc_rpl_p2p/Makefile.ci
+++ b/tests/net/gnrc_rpl_p2p/Makefile.ci
@@ -35,5 +35,4 @@ BOARD_INSUFFICIENT_MEMORY := \
     telosb \
     waspmote-pro \
     weact-g030f6 \
-    z1 \
     #
diff --git a/tests/net/gnrc_sock_udp/Makefile.ci b/tests/net/gnrc_sock_udp/Makefile.ci
index acb3d82e7ca90..f94a2e6427862 100644
--- a/tests/net/gnrc_sock_udp/Makefile.ci
+++ b/tests/net/gnrc_sock_udp/Makefile.ci
@@ -14,6 +14,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     nucleo-l011k4 \
     nucleo-l031k6 \
     olimex-msp430-h1611 \
+    olimex-msp430-h2618 \
     samd10-xmini \
     stk3200 \
     stm32f030f4-demo \
diff --git a/tests/pkg/fatfs_vfs/Makefile.ci b/tests/pkg/fatfs_vfs/Makefile.ci
index 32753677757e8..9d9af255a5b45 100644
--- a/tests/pkg/fatfs_vfs/Makefile.ci
+++ b/tests/pkg/fatfs_vfs/Makefile.ci
@@ -18,5 +18,4 @@ BOARD_INSUFFICIENT_MEMORY := \
     stk3200 \
     stm32f030f4-demo \
     telosb \
-    z1 \
     #
diff --git a/tests/pkg/u8g2/Makefile.ci b/tests/pkg/u8g2/Makefile.ci
index 3dede04dbe4de..df883c20c6e81 100644
--- a/tests/pkg/u8g2/Makefile.ci
+++ b/tests/pkg/u8g2/Makefile.ci
@@ -12,5 +12,4 @@ BOARD_INSUFFICIENT_MEMORY := \
     stk3200 \
     stm32f030f4-demo \
     telosb \
-    z1 \
     #
diff --git a/tests/riotboot_flashwrite/Makefile.ci b/tests/riotboot_flashwrite/Makefile.ci
index a738ab43bb69f..77eee6600c03a 100644
--- a/tests/riotboot_flashwrite/Makefile.ci
+++ b/tests/riotboot_flashwrite/Makefile.ci
@@ -29,5 +29,4 @@ BOARD_INSUFFICIENT_MEMORY := \
     stk3200 \
     stm32f0discovery \
     telosb \
-    z1 \
     #
diff --git a/tests/sys/bloom_bytes/Makefile.ci b/tests/sys/bloom_bytes/Makefile.ci
index cf1a705fe92bd..a4b8fbdeaab6c 100644
--- a/tests/sys/bloom_bytes/Makefile.ci
+++ b/tests/sys/bloom_bytes/Makefile.ci
@@ -8,5 +8,4 @@ BOARD_INSUFFICIENT_MEMORY := \
     nucleo-l011k4 \
     stm32f030f4-demo \
     telosb \
-    z1 \
     #
diff --git a/tests/sys/conn_can/Makefile.ci b/tests/sys/conn_can/Makefile.ci
index 6b710e80c9ef7..d45816870c1f9 100644
--- a/tests/sys/conn_can/Makefile.ci
+++ b/tests/sys/conn_can/Makefile.ci
@@ -28,5 +28,4 @@ BOARD_INSUFFICIENT_MEMORY := \
     stm32l0538-disco \
     telosb \
     yunjia-nrf51822 \
-    z1 \
     #
diff --git a/tests/sys/ps_schedstatistics/Makefile.ci b/tests/sys/ps_schedstatistics/Makefile.ci
index 7ae24644195e0..65e7e44e55fe3 100644
--- a/tests/sys/ps_schedstatistics/Makefile.ci
+++ b/tests/sys/ps_schedstatistics/Makefile.ci
@@ -24,5 +24,4 @@ BOARD_INSUFFICIENT_MEMORY := \
     stm32l0538-disco \
     telosb \
     weact-g030f6 \
-    z1 \
     #
diff --git a/tests/sys/suit_manifest/Makefile.ci b/tests/sys/suit_manifest/Makefile.ci
index df09f36a0b984..4816c2bb23306 100644
--- a/tests/sys/suit_manifest/Makefile.ci
+++ b/tests/sys/suit_manifest/Makefile.ci
@@ -20,5 +20,4 @@ BOARD_INSUFFICIENT_MEMORY := \
     stm32l0538-disco \
     telosb \
     weact-g030f6 \
-    z1 \
     #