diff --git a/nightly/conf/nightly.conf b/nightly/conf/nightly.conf
index 6964dee08..58902d55f 100644
--- a/nightly/conf/nightly.conf
+++ b/nightly/conf/nightly.conf
@@ -49,25 +49,6 @@ ABT_KERNELS="  \
 3.12.74-nc     \
 3.11.10-nc     \
 3.10.108-nc    \
-3.9.11-nc      \
-3.8.13-nc      \
-3.7.10-nc      \
-3.6.11-nc      \
-3.5.7-nc       \
-3.4.113-nc     \
-3.3.8-nc       \
-3.2.102-nc     \
-3.1.10-nc      \
-3.0.101-nc     \
-2.6.39.4-nc    \
-2.6.38.8-nc    \
-2.6.37.6-nc    \
-2.6.36.4-nc    \
-2.6.35.9-nc    \
-2.6.34.7-nc    \
-2.6.33.7-nc    \
-2.6.32.27-nc   \
-2.6.31.14-nc   \
 4.18.0-305.3.1.el8^CentOS^8.4.2105-nc    \
 4.18.0-240.15.1.el8_3^CentOS^8.3.2011-nc \
 4.18.0-193.28.1.el8_2^CentOS^8.2.2004-nc \
@@ -78,8 +59,6 @@ ABT_KERNELS="  \
 3.10.0-1062.18.1.el7^CentOS^7.7.1908-nc	\
 3.10.0-957.27.2.el7^CentOS^7.6.1810-nc	\
 3.10.0-862.14.4.el7^CentOS^7.5.1804-nc	\
-2.6.32-754.29.2.el6^CentOS^6.10-nc	\
-2.6.32-696.30.1.el6^CentOS^6.9-nc	\
 5.4.17-2102.200.13.el8uek^UEK^8-nc      \
 5.4.17-2036.101.2.el7uek^UEK^7-nc	\
 4.14.35-2025.403.3.el7uek^UEK^7-nc	\