diff --git a/etc/autobuild/ab3_defcfg.sh b/etc/autobuild/ab3_defcfg.sh
index 5a4ffc87..163d674d 100644
--- a/etc/autobuild/ab3_defcfg.sh
+++ b/etc/autobuild/ab3_defcfg.sh
@@ -169,4 +169,7 @@ abassigngroup() {
 : "${ABBUILD:="$(abdetectarch)"}"  "${ABHOST:=$ABBUILD}" "${ABTARGET:=$ABHOST}"
 ABHOST_GROUP="$(abassigngroup $ABHOST)"
 
+# Default configurations for ab3 package integrity check module.
+[[ -v $ABTEST_ENABLED ]] || ABTEST_ENABLED=0 # Disabled during current development cycle
+
 unset -f abdetectarch abassigngroup
diff --git a/exportvars/tests b/exportvars/tests
new file mode 100644
index 00000000..956d14d4
--- /dev/null
+++ b/exportvars/tests
@@ -0,0 +1,3 @@
+ABTEST_ENABLED
+ABTEST_TYPE
+ABTEST_TESTPROBES
diff --git a/lib/tests.sh b/lib/tests.sh
new file mode 100644
index 00000000..4fca3447
--- /dev/null
+++ b/lib/tests.sh
@@ -0,0 +1,19 @@
+#!/bin/bash
+##lib/tests.sh: Functions for test modules.
+##Part of AB3 integrated package test module
+##@copyright GPL-2.0+
+
+abtest_non-zero-handler() {
+    case $1 in
+        0) return 0;;
+        127) abwarn "No abtest() available in file ${2}";;
+        *) abwarn "Non-zero returned: ${1}!";;
+    esac
+}
+
+abtest_unprivileged_non-zero-handler() {
+    case $1 in
+        127) abwarn "No abtest_unprivileged() available in file ${2}";;
+        *) abtest_non-zero-handler $1 $2;;
+    esac
+}
diff --git a/proc/81-test_funcs.sh b/proc/81-test_funcs.sh
new file mode 100644
index 00000000..75363c9e
--- /dev/null
+++ b/proc/81-test_funcs.sh
@@ -0,0 +1,13 @@
+#!/bin/bash
+##proc/81-test_funcs: Loads the tests/ functions
+##Part of AB3 integrated package build-time test module
+##@copyright GPL-2.0+
+
+if bool $ABTEST_ENABLED; then
+    for i in "$AB/tests"/*.sh
+    do
+        . "$i"
+    done
+else
+    abinfo "Build-time package integrity check is disabled. Skipping ..."
+fi
diff --git a/proc/82-test_probe.sh b/proc/82-test_probe.sh
new file mode 100644
index 00000000..21d0c02a
--- /dev/null
+++ b/proc/82-test_probe.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+##proc/82-test_probe.sh: Determining test type
+##Part of AB3 integrated package build-time test module
+##@copyright GPL-2.0+
+
+if bool $ABTEST_ENABLED; then
+    if [ -z "$ABTEST_TYPE"]; then
+        abinfo "No $ABTEST_TYPE set, automatically determining ..."
+        for i in $ABTEST_TESTPROBES; do
+            if abtest_${i}_probe; then
+                abinfo "Automatically set ABTEST_TYPE to ${i}"
+                ABTEST_TYPE=$i
+                break
+            fi
+        done
+    fi
+fi
diff --git a/proc/83-test_exec.sh b/proc/83-test_exec.sh
new file mode 100644
index 00000000..cf569f03
--- /dev/null
+++ b/proc/83-test_exec.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+##proc/83-test_exec.sh: Perform test
+##Part of AB3 integrated package build-time test module
+##@copyright GPL-2.0+
+
+if bool $ABTEST_ENABLED; then
+    cd "$SRCDIR" 
+    # FIXME: use a non-zero handler?
+    abtest_${ABTEST_TYPE}_test || \
+        abwarn "Test exited with non-zero status: $?"
+fi
diff --git a/tests/00-self_file.sh b/tests/00-self_file.sh
new file mode 100644
index 00000000..d4fed8e8
--- /dev/null
+++ b/tests/00-self_file.sh
@@ -0,0 +1,33 @@
+#!/bin/bash
+##tests/00-self_file.sh: invoke testing function defined in `autobuild/test`
+##Part of AB3 integrated package build-time test module
+##@copyright GPL-2.0+
+
+##FIXME: implement unprivileged tests
+
+abtrylib arch tests || ablibret
+
+abtest_self_file_probe() {
+    [ -f "$(arch_trymore=1 arch_findfile test)" ]
+}
+
+abtest_self_file_test() {
+
+    abtest() {
+        abwarn "ABTEST_TYPE is set to self_file, but no abtest() found in autobuild{,/\$ARCH}/test"
+        return 127
+    }
+
+    abtest_unprivileged() {
+        abwarn "ABTEST_TYPE is set to self_file, but no abtest_unprivileged() found in autobuild{,/\$ARCH}/test"
+        return 127
+    }
+
+    # Redefine 
+    arch_loadfile test
+
+    abtest || abtest_non-zero-handler $? "$SRCDIR"/test
+    abtest_unprivileged || abtest_unprivileged_non-zero-handler $? "$SRCDIR"/test
+}
+
+ABTEST_TESTPROBES+=' self_file'
diff --git a/tests/01-self_files.sh b/tests/01-self_files.sh
new file mode 100644
index 00000000..5296a767
--- /dev/null
+++ b/tests/01-self_files.sh
@@ -0,0 +1,27 @@
+#!/bin/bash
+##tests/01-self_files.sh: invoke testing function defined in `autobuild/tests/T*.sh`
+##Part of AB3 integrated package build-time test module
+##@copyright GPL-2.0+
+
+##FIXME: implement unprivileged tests
+
+abtrylib tests || ablibret
+
+abtest_self_files_probe() {
+    [ -d "$SRCDIR"/autobuild/tests ]
+}
+
+abtest_self_files_test() {
+    . "$AB/lib/tests.sh"
+
+    for i in "$SRCDIR"/autobuild/tests/T*.sh
+    do
+        abinfo "Loading test case file ${i} and performing tests ..."
+        . $i
+        abtest || abtest_non-zero-handler $? $i
+        abtest_unprivileged || abtest_unprivileged_non-zero-handler $? $i
+        unset abtest abtest_unprivileged
+    done
+}
+
+ABTEST_TESTPROBES+=' self_files'
diff --git a/tests/99-notest.sh b/tests/99-notest.sh
new file mode 100644
index 00000000..f4d608ba
--- /dev/null
+++ b/tests/99-notest.sh
@@ -0,0 +1,14 @@
+#!/bin/bash
+##tests/99-notest.sh: Dummy file indicates that test is not available or skipped.
+##Part of AB3 integrated package build-time test module
+##@copyright GPL-2.0+
+
+abtest_notest_probe() {
+    true
+}
+
+abtest_notest_test(){
+    abinfo "ABTEST_TYPE is set to 'notest'. Skipping..."
+}
+
+ABTEST_TESTPROBES+=' notest'