diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group
index b34c8e3c0c6..f13e5f2e234 100644
--- a/tests/qemu-iotests/group
+++ b/tests/qemu-iotests/group
@@ -14,7 +14,9 @@
 #   runnable in any case. That means they should run with every QEMU binary
 #   (also non-x86), with every QEMU configuration (i.e. must not fail if
 #   an optional feature is not compiled in - but reporting a "skip" is ok),
-#   and work all kind of host filesystems and users (e.g. "nobody" or "root").
+#   work at least with the qcow2 file format, work with all kind of host
+#   filesystems and users (e.g. "nobody" or "root") and must not take too
+#   much memory and disk space (since CI pipelines tend to fail otherwise).
 #
 
 #
@@ -33,8 +35,8 @@
 011 rw auto quick
 012 auto quick
 013 rw auto
-014 rw auto
-015 rw snapshot auto
+014 rw
+015 rw snapshot
 # 016 was removed, do not reuse
 017 rw backing auto quick
 018 rw backing auto quick
@@ -42,7 +44,7 @@
 020 rw backing auto quick
 021 io auto quick
 022 rw snapshot auto
-023 rw auto
+023 rw
 024 rw backing auto quick
 025 rw auto quick
 026 rw blkdbg
@@ -78,94 +80,94 @@
 056 rw backing
 057 rw
 058 rw quick
-059 rw auto quick
+059 rw quick
 060 rw auto quick
 061 rw auto
 062 rw auto quick
 063 rw auto quick
-064 rw auto quick
+064 rw quick
 065 rw quick
 066 rw auto quick
 067 rw quick
 068 rw quick
 069 rw auto quick
-070 rw auto quick
+070 rw quick
 071 rw auto quick
 072 rw auto quick
 073 rw auto quick
 074 rw auto quick
-075 rw auto quick
-076 auto
-077 rw auto quick
-078 rw auto quick
+075 rw quick
+076 io
+077 rw quick
+078 rw quick
 079 rw auto
 080 rw auto
-081 rw auto quick
-082 rw auto quick
-083 rw auto
-084 img auto quick
+081 rw quick
+082 rw quick
+083 rw
+084 img quick
 085 rw
 086 rw auto quick
 087 rw quick
-088 rw auto quick
+088 rw quick
 089 rw auto quick
 090 rw auto quick
-091 rw auto migration
-092 rw auto quick
+091 rw migration
+092 rw quick
 093 throttle
-094 rw auto quick
+094 rw quick
 095 rw quick
 096 rw quick
 097 rw auto backing
 098 rw auto backing quick
 099 rw auto quick
 # 100 was removed, do not reuse
-101 rw auto quick
-102 rw auto quick
+101 rw quick
+102 rw quick
 103 rw auto quick
 104 rw auto
 105 rw auto quick
-106 rw auto quick
+106 rw quick
 107 rw auto quick
 108 rw auto quick
-109 rw auto
+109 rw
 110 rw auto backing quick
 111 rw auto quick
 112 rw
-113 rw auto quick
+113 rw quick
 114 rw auto quick
 115 rw
-116 rw auto quick
+116 rw quick
 117 rw auto
 118 rw
-119 rw auto quick
+119 rw quick
 120 rw auto quick
 121 rw
-122 rw auto
-123 rw auto quick
+122 rw
+123 rw quick
 124 rw backing
 125 rw
 126 rw auto backing
 127 rw backing quick
-128 rw auto quick
+128 rw quick
 129 rw quick
 130 rw auto quick
-131 rw auto quick
+131 rw quick
 132 rw quick
 133 auto quick
 134 rw auto quick
-135 rw auto
+135 rw
 136 rw
 137 rw auto
 138 rw auto quick
 139 rw quick
 140 rw auto quick
 141 rw auto quick
-142 auto
+142
 143 auto quick
 144 rw quick
 145 quick
-146 auto quick
+146 quick
 147 img
 148 rw quick
 149 rw sudo
@@ -179,23 +181,23 @@
 157 quick
 158 rw auto quick
 159 rw auto quick
-160 rw auto quick
+160 rw quick
 161 rw auto quick
 162 quick
 163 rw
 165 rw quick
 169 rw quick migration
 170 rw auto quick
-171 rw auto quick
+171 rw quick
 172 auto
-173 rw auto
+173 rw
 174 auto
-175 auto quick
+175 quick
 176 rw auto backing
 177 rw auto quick
 178 img
 179 rw auto quick
-181 rw auto migration
+181 rw migration
 182 rw quick
 183 rw migration
 184 rw auto quick
@@ -210,62 +212,62 @@
 194 rw migration quick
 195 rw auto quick
 196 rw quick migration
-197 rw auto quick
+197 rw quick
 198 rw
 199 rw migration
 200 rw
-201 rw auto migration
+201 rw migration
 202 rw quick
 203 rw migration
 204 rw quick
 205 rw quick
 206 rw
-207 rw auto
+207 rw
 208 rw quick
 209 rw quick
-210 rw auto
-211 rw auto quick
-212 rw auto quick
-213 rw auto quick
+210 rw
+211 rw quick
+212 rw quick
+213 rw quick
 214 rw auto
-215 rw auto quick
+215 rw quick
 216 rw quick
 217 rw auto quick
 218 rw quick
 219 rw
 220 rw auto
-221 rw auto quick
+221 rw quick
 222 rw quick
 223 rw quick
 224 rw quick
-225 rw auto quick
+225 rw quick
 226 auto quick
 227 quick
 228 rw quick
 229 auto quick
-231 auto quick
+231 quick
 232 quick
-233 auto quick
+233 quick
 234 quick migration
 235 quick
 236 quick
-237 rw auto quick
+237 rw quick
 238 quick
-239 rw auto quick
+239 rw quick
 240 quick
-241 rw auto quick
+241 rw quick
 242 rw quick
-243 rw auto quick
+243 rw quick
 244 rw auto quick
 245 rw
 246 rw quick
 247 rw quick
 248 rw quick
 249 rw auto quick
-250 rw auto quick
+250 rw quick
 251 rw auto quick
 252 rw auto backing quick
-253 rw auto quick
-254 rw auto backing quick
-255 rw auto quick
-256 rw auto quick
+253 rw quick
+254 rw backing quick
+255 rw quick
+256 rw quick
