diff --git a/.ci/lib/testlib.sh b/.ci/lib/testlib.sh
index 83e873fb4..a9c0bcf0f 100755
--- a/.ci/lib/testlib.sh
+++ b/.ci/lib/testlib.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-# Unit tests for the postmarketOS initramfs
+# Unit testing framework for shell scripts
 # Invoke with the path to a tests/ subdir of a package and the
 # package name as arguments. Or source it with the following
 # variables set:
@@ -27,15 +27,19 @@ _test_statefile="$(mktemp)"
 results_dir="${results_dir:-}"
 
 test_log() {
-	printf "%s\n" "$*" >&2
+	# ash supports echo -e
+	# shellcheck disable=SC3037
+	echo -e "$*" >&2
 }
 
 test_info() {
-	printf "${BLUE}%s${RESET}\n" "$*" >&2
+	# shellcheck disable=SC3037
+	echo -e "${BLUE}$*${RESET}" >&2
 }
 
 test_debug() {
-	printf "${YELLOW}%s${RESET}\n" "$*" >&2
+	# shellcheck disable=SC3037
+	echo -e "${YELLOW}$*${RESET}" >&2
 }
 
 assert_strequal() {
@@ -189,6 +193,7 @@ run_tests() {
 	if [ -n "$failed" ]; then exit 1; else exit 0; fi
 }
 
+# FIXME: probably not the best way to determine if this was sourced
 if [ $# -gt 0 ]; then
 	run_tests "$1" "$2"
 fi
diff --git a/main/postmarketos-initramfs/tests/.gitlab-ci.yml b/main/postmarketos-initramfs/tests/.gitlab-ci.yml
new file mode 100644
index 000000000..966f95adb
--- /dev/null
+++ b/main/postmarketos-initramfs/tests/.gitlab-ci.yml
@@ -0,0 +1,9 @@
+
+initramfs-unit-tests:
+  extends: .package-test
+  script:
+    - .ci/lib/testlib.sh main/postmarketos-initramfs/tests
+  rules:
+    - if: $CI_PIPELINE_SOURCE == "merge_request_event" || $CI_COMMIT_REF_PROTECTED == "false"
+      changes:
+        - main/postmarketos-initramfs/*.sh
diff --git a/main/postmarketos-initramfs/tests/01-parse-cmdline.sh b/main/postmarketos-initramfs/tests/01-parse-cmdline.sh
new file mode 100755
index 000000000..4176007b6
--- /dev/null
+++ b/main/postmarketos-initramfs/tests/01-parse-cmdline.sh
@@ -0,0 +1,73 @@
+#!/bin/sh
+
+srcdir="$(dirname "$(realpath $0)")/.."
+testlib_path="$1"
+shift
+# Used by testlib.sh
+# shellcheck disable=SC2034
+results_dir="$1"
+shift
+
+# All arguments have to be consumed before sourcing testlib!
+# shellcheck disable=SC1090
+. "$testlib_path"
+
+### Test 1 ###
+
+start_test "Ensure all boolean variables can be set"
+. "$srcdir/init_functions.sh"
+
+# busybox ash supports process substitution
+# shellcheck disable=SC3001
+parse_cmdline < <(echo \
+pmos.bootchart2 pmos.debug-shell pmos.force-partition-resize \
+pmos.nosplash pmos.stowaway rd.info \
+)
+
+assert_equal "bootchart2" "y"
+assert_equal "debug_shell" "y"
+assert_equal "force_partition_resize" "y"
+assert_equal "nosplash" "y"
+assert_equal "log_info" "y"
+end_test
+
+### Test 2 ###
+
+start_test "Ensure non-boolean variables can be set"
+. $srcdir/init_functions.sh
+
+# busybox ash supports process substitution
+# shellcheck disable=SC3001
+parse_cmdline < <(echo \
+pmos.boot_uuid=xyz-789 pmos.root_uuid=abc-123 \
+pmos.usb-storage=/dev/sdc \
+pmos.boot=/dev/mapper/userdata1 \
+pmos.root=/dev/disk/by-partlabel/userdata \
+pmos.rootfsopts=default
+)
+
+assert_equal "boot_uuid" "xyz-789"
+assert_equal "root_uuid" "abc-123"
+assert_equal "usb_storage" "/dev/sdc"
+assert_equal "boot_path" "/dev/mapper/userdata1"
+assert_equal "root_path" "/dev/disk/by-partlabel/userdata"
+assert_equal "rootfsopts" ",default"
+
+test_info "Checking other variables are unset"
+assert_unset debug_shell
+assert_unset nosplash
+assert_unset bootchart2
+end_test
+
+### Test 3 ###
+
+start_test "Test info loglevel"
+. $srcdir/init_functions.sh
+
+assert_unset log_info
+assert_unset "(info hello world)"
+logeval parse_cmdline_item "rd.info"
+assert_equal "(info hello world)" "hello world"
+end_test
+
+end_testsuite
diff --git a/main/postmarketos-initramfs/tests/02-find-partition.sh b/main/postmarketos-initramfs/tests/02-find-partition.sh
new file mode 100755
index 000000000..3549e2f78
--- /dev/null
+++ b/main/postmarketos-initramfs/tests/02-find-partition.sh
@@ -0,0 +1,196 @@
+#!/bin/sh
+
+srcdir="$(dirname "$(realpath "$0")")/.."
+testlib_path="$1"
+shift
+# Used by testlib.sh
+# shellcheck disable=SC2034
+results_dir="$1"
+shift
+
+# All arguments have to be consumed before sourcing testlib!
+# shellcheck disable=SC1090
+. "$testlib_path"
+
+# Mock blkid that produces a path for all expected arguments
+# except for --label if the label isn't "pmOS_valid"
+blkid_mock_find_all() {
+	local fail
+	test_debug "+ blkid $*"
+	case "$1" in
+		--uuid)
+			case "$2" in
+				"abcd-1234")
+					echo "/dev/sda2"
+					;;
+				"deaf-5678")
+					echo "/dev/sda1"
+					;;
+				*)
+					fail="Unexpected arguments to blkid: $*"
+					assert_unset fail
+					;;
+			esac
+			;;
+		--label)
+			if [ "$2" = "pmOS_valid" ]; then
+				echo "/dev/disk/by-label/pmOS_root"
+			fi
+			return
+			;;
+		--match-token)
+			assert_strequal "$2" "TYPE=crypto_LUKS"
+			echo "/dev/sda17"
+			;;
+		*)
+			fail="Unexpected arguments to blkid: $*"
+			assert_unset fail
+			;;
+	esac
+}
+
+### Test 1 ###
+
+start_test "Test find_partition happy paths"
+. "$srcdir/init_functions.sh"
+
+# For this we need to mock a few things
+pretty_dm_path() {
+	echo "$1"
+}
+
+blkid() {
+	# Splitting is intentional
+	# shellcheck disable=SC2068
+	blkid_mock_find_all $@
+}
+
+# Test all the happy paths, for all of these we assume that blkid would succeed
+test_info "A) Valid UUID (ideal case)"
+logeval 'found="$(find_partition abcd-1234 /dev/null pmOS_root "TYPE=crypto_LUKS")"'
+assert_equal found /dev/sda2
+
+test_info
+test_info "B) No UUID but valid path from pmos.root="
+logeval 'found="$(find_partition "" /dev/null pmOS_root "TYPE=crypto_LUKS")"'
+assert_equal found /dev/null
+
+test_info
+test_info "C) No UUID or path, rely on the label"
+logeval 'found="$(find_partition "" "" pmOS_valid "TYPE=crypto_LUKS")"'
+assert_equal found /dev/disk/by-label/pmOS_root
+
+test_info
+test_info "D) No UUID, path, and missing label (FDE case)"
+logeval 'found="$(find_partition "" "" pmOS_invalid "TYPE=crypto_LUKS")"'
+assert_equal found /dev/sda17
+
+end_test
+
+### Test 2 ###
+
+start_test "Test find_partition sad paths"
+. $srcdir/init_functions.sh
+
+
+# For this we need to mock a few things
+pretty_dm_path() {
+	echo "$1"
+}
+
+test_info "A) Partition with given UUID doesn't exist, no other lookup is done"
+# Returns nothing when called with --uuid, fails for any other
+# arguments. This simulates a partition with the given UUID
+# not existing AND that we never call with blkid to look up
+# by label or match token.
+blkid() {
+	test_debug "blkid $*"
+	case "$1" in
+		--uuid)
+			assert_strequal "$2" "abcd-1234"
+			return
+			;;
+		*)
+			fail="Unexpected arguments to blkid: $*"
+			assert_unset fail
+			;;
+	esac
+}
+
+logeval 'found="$(find_partition abcd-1234 /dev/null pmOS_root "TYPE=crypto_LUKS")"'
+assert_unset found
+
+test_info "B) No UUID, partition with given path doesn't exist, no other lookup is done"
+logeval 'found="$(find_partition "" /dev/notablockdev pmOS_root "TYPE=crypto_LUKS")"'
+assert_unset found
+
+test_info "C) No UUID, no path, label and match token not found"
+# Returns nothing, errors if not called with --uuid,
+# --label, or --match-token
+blkid() {
+	test_debug "blkid $*"
+	case "$1" in
+		--uuid)
+			assert_strequal "$2" "abcd-1234"
+			return
+			;;
+		--label)
+			assert_strequal "$2" "pmOS_root"
+			return
+			;;
+		--match-token)
+			assert_strequal "$2" "TYPE=crypto_LUKS"
+			return
+			;;
+		*)
+			fail="Unexpected arguments to blkid: $*"
+			assert_unset fail
+			;;
+	esac
+}
+logeval 'found="$(find_partition "" "" pmOS_root "TYPE=crypto_LUKS")"'
+assert_unset found
+
+end_test
+
+### Test 3 ###
+
+start_test "Test find_root_partition and find_boot_partition"
+. $srcdir/init_functions.sh
+
+# Mocks
+pretty_dm_path() {
+	echo "$1"
+}
+
+blkid() {
+	# Splitting is intentional
+	# shellcheck disable=SC2068
+	blkid_mock_find_all $@
+}
+
+test_info "A) Valid UUID, result is cached"
+logeval 'root_uuid=abcd-1234'
+logeval 'boot_uuid=deaf-5678'
+
+logeval 'find_root_partition found'
+assert_equal found /dev/sda2
+logeval 'find_boot_partition found'
+assert_equal found /dev/sda1
+
+blkid() {
+	local fail
+	# fail is used indirectly
+	# shellcheck disable=SC2034
+	fail="blkid called when expecting cached result"
+	assert_unset fail
+}
+
+logeval 'find_root_partition found'
+assert_equal found /dev/sda2
+logeval 'find_boot_partition found'
+assert_equal found /dev/sda1
+
+end_test
+
+end_testsuite