diff --git a/test/TEST-08-ISSUE-2730/test.sh b/test/TEST-08-ISSUE-2730/test.sh
index 83557f22..5d76ee05 100755
--- a/test/TEST-08-ISSUE-2730/test.sh
+++ b/test/TEST-08-ISSUE-2730/test.sh
@@ -10,6 +10,7 @@ TEST_NO_NSPAWN=1
 . "${TEST_BASE_DIR:?}/test-functions"
 
 QEMU_TIMEOUT=300
+QEMU_MEM="1024M"
 TEST_FORCE_NEWIMAGE=1
 
 do_test "$@"
diff --git a/test/TEST-09-ISSUE-2691/test.sh b/test/TEST-09-ISSUE-2691/test.sh
index 1c995f48..94c1fc7a 100755
--- a/test/TEST-09-ISSUE-2691/test.sh
+++ b/test/TEST-09-ISSUE-2691/test.sh
@@ -9,5 +9,6 @@ TEST_NO_NSPAWN=1
 . "${TEST_BASE_DIR:?}/test-functions"
 
 QEMU_TIMEOUT=300
+QEMU_MEM="1024M"
 
 do_test "$@"
diff --git a/test/TEST-11-ISSUE-3166/test.sh b/test/TEST-11-ISSUE-3166/test.sh
index 9adccc10..577be97c 100755
--- a/test/TEST-11-ISSUE-3166/test.sh
+++ b/test/TEST-11-ISSUE-3166/test.sh
@@ -9,5 +9,6 @@ TEST_NO_NSPAWN=1
 . "${TEST_BASE_DIR:?}/test-functions"
 
 QEMU_TIMEOUT=300
+QEMU_MEM="1024M"
 
 do_test "$@"
diff --git a/test/TEST-13-NSPAWN-SMOKE/test.sh b/test/TEST-13-NSPAWN-SMOKE/test.sh
index 3d1e5044..f3c4d726 100755
--- a/test/TEST-13-NSPAWN-SMOKE/test.sh
+++ b/test/TEST-13-NSPAWN-SMOKE/test.sh
@@ -27,4 +27,6 @@ test_append_files() {
     )
 }
 
+QEMU_MEM="1024M"
+
 do_test "$@"
diff --git a/test/TEST-14-MACHINE-ID/test.sh b/test/TEST-14-MACHINE-ID/test.sh
index afaa4cfb..bd2b3a51 100755
--- a/test/TEST-14-MACHINE-ID/test.sh
+++ b/test/TEST-14-MACHINE-ID/test.sh
@@ -13,4 +13,6 @@ test_append_files() {
     printf "556f48e837bc4424a710fa2e2c9d3e3c\ne3d\n" >"${1:?}/etc/machine-id"
 }
 
+QEMU_MEM="1024M"
+
 do_test "$@"
diff --git a/test/TEST-17-UDEV/test.sh b/test/TEST-17-UDEV/test.sh
index 079ecfd6..921b69f7 100755
--- a/test/TEST-17-UDEV/test.sh
+++ b/test/TEST-17-UDEV/test.sh
@@ -10,5 +10,6 @@ TEST_NO_NSPAWN=1
 . "${TEST_BASE_DIR:?}/test-functions"
 
 QEMU_TIMEOUT=800
+QEMU_MEM="1024M"
 
 do_test "$@"
diff --git a/test/TEST-19-DELEGATE/test.sh b/test/TEST-19-DELEGATE/test.sh
index 56237083..75929320 100755
--- a/test/TEST-19-DELEGATE/test.sh
+++ b/test/TEST-19-DELEGATE/test.sh
@@ -9,6 +9,7 @@ TEST_NO_NSPAWN=1
 . "${TEST_BASE_DIR:?}/test-functions"
 
 QEMU_TIMEOUT=600
+QEMU_MEM="1024M"
 UNIFIED_CGROUP_HIERARCHY=yes
 
 do_test "$@"
diff --git a/test/TEST-24-CRYPTSETUP/test.sh b/test/TEST-24-CRYPTSETUP/test.sh
index b81b8116..481d6f78 100755
--- a/test/TEST-24-CRYPTSETUP/test.sh
+++ b/test/TEST-24-CRYPTSETUP/test.sh
@@ -14,6 +14,7 @@ PART_UUID="deadbeef-dead-dead-beef-000000000000"
 DM_NAME="test24_varcrypt"
 KERNEL_APPEND+=" rd.luks=1 luks.name=$PART_UUID=$DM_NAME luks.key=$PART_UUID=/keyfile:LABEL=varcrypt_keydev"
 QEMU_OPTIONS+=" -drive format=raw,cache=unsafe,file=${STATEDIR:?}/keydev.img"
+QEMU_MEM="1024M"
 
 check_result_qemu() {
     local ret=1
diff --git a/test/TEST-29-PORTABLE/test.sh b/test/TEST-29-PORTABLE/test.sh
index 7727e7b5..2b968b53 100755
--- a/test/TEST-29-PORTABLE/test.sh
+++ b/test/TEST-29-PORTABLE/test.sh
@@ -27,4 +27,6 @@ test_append_files() {
     )
 }
 
+QEMU_MEM="1024M"
+
 do_test "$@"
diff --git a/test/TEST-30-ONCLOCKCHANGE/test.sh b/test/TEST-30-ONCLOCKCHANGE/test.sh
index 69dbdb2b..66fdb391 100755
--- a/test/TEST-30-ONCLOCKCHANGE/test.sh
+++ b/test/TEST-30-ONCLOCKCHANGE/test.sh
@@ -8,4 +8,6 @@ TEST_NO_NSPAWN=1
 # shellcheck source=test/test-functions
 . "${TEST_BASE_DIR:?}/test-functions"
 
+QEMU_MEM="1024M"
+
 do_test "$@"
diff --git a/test/TEST-31-DEVICE-ENUMERATION/test.sh b/test/TEST-31-DEVICE-ENUMERATION/test.sh
index 01dd8744..da4c99eb 100755
--- a/test/TEST-31-DEVICE-ENUMERATION/test.sh
+++ b/test/TEST-31-DEVICE-ENUMERATION/test.sh
@@ -9,5 +9,6 @@ TEST_NO_NSPAWN=1
 . "${TEST_BASE_DIR:?}/test-functions"
 
 QEMU_TIMEOUT=300
+QEMU_MEM="1024M"
 
 do_test "$@"
diff --git a/test/TEST-32-OOMPOLICY/test.sh b/test/TEST-32-OOMPOLICY/test.sh
index 78c4e648..0cad0788 100755
--- a/test/TEST-32-OOMPOLICY/test.sh
+++ b/test/TEST-32-OOMPOLICY/test.sh
@@ -9,5 +9,6 @@ TEST_NO_NSPAWN=1
 . "${TEST_BASE_DIR:?}/test-functions"
 
 UNIFIED_CGROUP_HIERARCHY=yes
+QEMU_MEM="1024M"
 
 do_test "$@"
diff --git a/test/TEST-36-NUMAPOLICY/test.sh b/test/TEST-36-NUMAPOLICY/test.sh
index 5f38bf10..0bd1ec5e 100755
--- a/test/TEST-36-NUMAPOLICY/test.sh
+++ b/test/TEST-36-NUMAPOLICY/test.sh
@@ -8,6 +8,8 @@ TEST_NO_NSPAWN=1
 # shellcheck source=test/test-functions
 . "${TEST_BASE_DIR:?}/test-functions"
 
+QEMU_MEM="1024M"
+
 if qemu_min_version "5.2.0"; then
     QEMU_OPTIONS="-object memory-backend-ram,id=mem0,size=${QEMU_MEM:?} -numa node,memdev=mem0,nodeid=0"
 else
diff --git a/test/TEST-38-FREEZER/test.sh b/test/TEST-38-FREEZER/test.sh
index da7bfc64..8d4d0f0d 100755
--- a/test/TEST-38-FREEZER/test.sh
+++ b/test/TEST-38-FREEZER/test.sh
@@ -8,4 +8,6 @@ TEST_NO_NSPAWN=1
 # shellcheck source=test/test-functions
 . "${TEST_BASE_DIR:?}/test-functions"
 
+QEMU_MEM="1024M"
+
 do_test "$@"
diff --git a/test/TEST-50-DISSECT/test.sh b/test/TEST-50-DISSECT/test.sh
index c6cd42d0..85745b83 100755
--- a/test/TEST-50-DISSECT/test.sh
+++ b/test/TEST-50-DISSECT/test.sh
@@ -13,6 +13,7 @@ TEST_INSTALL_VERITY_MINIMAL=1
 . "${TEST_BASE_DIR:?}/test-functions"
 
 QEMU_TIMEOUT=1200
+QEMU_MEM="1024M"
 
 command -v mksquashfs >/dev/null 2>&1 || exit 0
 command -v veritysetup >/dev/null 2>&1 || exit 0
diff --git a/test/TEST-53-ISSUE-16347/test.sh b/test/TEST-53-ISSUE-16347/test.sh
index 7f44c66b..64d1543a 100755
--- a/test/TEST-53-ISSUE-16347/test.sh
+++ b/test/TEST-53-ISSUE-16347/test.sh
@@ -10,4 +10,6 @@ QEMU_OPTIONS="-rtc base=$(date -u +%Y-%m-%dT%H:%M:%S -d '+3 days')"
 # shellcheck source=test/test-functions
 . "${TEST_BASE_DIR:?}/test-functions"
 
+QEMU_MEM="1024M"
+
 do_test "$@"
diff --git a/test/TEST-58-REPART/test.sh b/test/TEST-58-REPART/test.sh
index 362236c0..a22b0485 100755
--- a/test/TEST-58-REPART/test.sh
+++ b/test/TEST-58-REPART/test.sh
@@ -8,4 +8,6 @@ TEST_NO_NSPAWN=1
 # shellcheck source=test/test-functions
 . "$TEST_BASE_DIR/test-functions"
 
+QEMU_MEM="1024M"
+
 do_test "$@"
diff --git a/test/TEST-61-UNITTESTS-QEMU/test.sh b/test/TEST-61-UNITTESTS-QEMU/test.sh
index 45c5f71b..683f0889 100755
--- a/test/TEST-61-UNITTESTS-QEMU/test.sh
+++ b/test/TEST-61-UNITTESTS-QEMU/test.sh
@@ -17,6 +17,8 @@ $KERNEL_APPEND
 # shellcheck source=test/test-functions
 . "${TEST_BASE_DIR:?}/test-functions"
 
+QEMU_MEM="1024M"
+
 check_result_nspawn() {
     check_result_nspawn_unittests "${1}"
 }
diff --git a/test/TEST-62-RESTRICT-IFACES/test.sh b/test/TEST-62-RESTRICT-IFACES/test.sh
index db8290b7..8e653880 100755
--- a/test/TEST-62-RESTRICT-IFACES/test.sh
+++ b/test/TEST-62-RESTRICT-IFACES/test.sh
@@ -8,4 +8,6 @@ TEST_NO_NSPAWN=1
 # shellcheck source=test/test-functions
 . "$TEST_BASE_DIR/test-functions"
 
+QEMU_MEM="1024M"
+
 do_test "$@"
diff --git a/test/TEST-66-DEVICE-ISOLATION/test.sh b/test/TEST-66-DEVICE-ISOLATION/test.sh
index 28eed2c6..78dfed82 100755
--- a/test/TEST-66-DEVICE-ISOLATION/test.sh
+++ b/test/TEST-66-DEVICE-ISOLATION/test.sh
@@ -8,4 +8,6 @@ TEST_NO_NSPAWN=1
 # shellcheck source=test/test-functions
 . "${TEST_BASE_DIR:?}/test-functions"
 
+QEMU_MEM="1024M"
+
 do_test "$@"
diff --git a/test/TEST-67-INTEGRITY/test.sh b/test/TEST-67-INTEGRITY/test.sh
index b3bc1441..94b135b7 100755
--- a/test/TEST-67-INTEGRITY/test.sh
+++ b/test/TEST-67-INTEGRITY/test.sh
@@ -6,6 +6,7 @@ TEST_DESCRIPTION="dm-integrity test"
 
 TEST_NO_NSPAWN=1
 QEMU_TIMEOUT=600
+QEMU_MEM="1024M"
 
 # shellcheck source=test/test-functions
 . "${TEST_BASE_DIR:?}/test-functions"
diff --git a/test/TEST-70-TPM2/test.sh b/test/TEST-70-TPM2/test.sh
index d716614b..60e8dda9 100755
--- a/test/TEST-70-TPM2/test.sh
+++ b/test/TEST-70-TPM2/test.sh
@@ -36,5 +36,6 @@ tpmstate=$(mktemp -d)
 swtpm socket --tpm2 --tpmstate dir="$tpmstate" --ctrl type=unixio,path="$tpmstate/sock" &
 trap 'kill %%; rm -rf $tpmstate' SIGINT EXIT
 QEMU_OPTIONS="-chardev socket,id=chrtpm,path=$tpmstate/sock -tpmdev emulator,id=tpm0,chardev=chrtpm -device $tpmdevice,tpmdev=tpm0"
+QEMU_MEM="1024M"
 
 do_test "$@"