diff --git a/.sig/manifest.8E47A1EC35A1551D.asc b/.sig/manifest.8E47A1EC35A1551D.asc
index 936ad5b..0b1958e 100644
--- a/.sig/manifest.8E47A1EC35A1551D.asc
+++ b/.sig/manifest.8E47A1EC35A1551D.asc
@@ -1,16 +1,16 @@
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diff --git a/.sig/manifest.txt b/.sig/manifest.txt
index f799463..c002344 100644
--- a/.sig/manifest.txt
+++ b/.sig/manifest.txt
@@ -1,8 +1,18 @@
 64263feac7b00952e9ec3b6c1fd11316faa58ff673c6bd085fac9f6f8d8389f6 .gitignore
 67377eee89dfc4411665474ac0bee0f9a19ea7e594bcc8606b0bc3ace69f0aa1 .gitlab-ci.yml
-41d2be0d611c203c28303f083bfa142fcc1aa9222b80903a8a4b7279f7a27eca Makefile
+c38c2540b680a721a741b4613f9a8d443c8ed8952994f10f73fd8183c3288df7 Makefile
 464ed12795e3e41eee83713709069fefb07f0676ba237894a9325aafe5c91e31 README.md
 bb1a24c30f2a26889195deac4ad98fcf9fd485baa4aa1dd04c12abef8212f6ad sig
-655df07f3827e7055d0c6aa21a0a4907957a34a2b8a1e9131225c537e448e2e3 test/Dockerfile
-55250be3c8f25dcbe68a73e8de8c8a94d8ceb0354c7f955519373d9c963903dd test/test.bats
-c95e072f0917531257c069516fc1bf08fd98e5c5f3958f5353a219cb5b70fd38 test/test_helper.bash
+646a6c11ef22d51bd7fadff5ecc806d8d3e7c62151a0dd56bbeb59eca74c671c test/Dockerfile
+dd79ef0e6d0738321f916a5c85a60d44152fb1ffcd71572de98cf48e0d0d911c test/keys/user1.pub.asc
+c98a656738f188f650fa0107e3478d640c175a3db481a6c3cbc267f75a05b440 test/keys/user1.sec.asc
+aad434de4a8d22d3152769f41f4da39229fec686938d46bf4c31cd9f5f267092 test/keys/user2.pub.asc
+4d9433f86858c5b3d188d9b28a550a01149032f4411e4ff41cccf2cf5424fae9 test/keys/user2.sec.asc
+bd655f201043873280a387f4694d94ec299e4d6b5b2bf0ad7080153ddbd67ce8 test/keys/user3.pub.asc
+c0e3df63b1f01a83e17c463af9e37365a5e38ee0289d59cdfee725df202a311b test/keys/user3.sec.asc
+4740db645194e0bae7a0dae88afb4a8e7f67cba35b0b31ba8036529aa3592e2a test/keys/user4.pub.asc
+d4cbeffdbf7064aaffe94556b5879c88cddf479e3e76518f25c3491482abd789 test/keys/user4.sec.asc
+c608e63175a1e9cc3fe2500372769a9e30b808d2e4d4a950796d98dac14775ea test/keys/user5.pub.asc
+873f3a1e2da41587f4b5a0dad5d8b704a37144e54931fe3a167ea9648772a5dc test/keys/user5.sec.asc
+0e3bc44d39fb4b8eb0947e802b5a3a4db14ae228c116eb6b33b32c4cd6816c6f test/test.bats
+418903b58dad935ee3aa1dfcc4c4ac22fd77a838b87a5c2c3fe4e510a164f0a0 test/test_helper.bash
diff --git a/Makefile b/Makefile
index 523447e..b0f0952 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,6 @@
+.PHONY: all
+all: lint test verify
+
 .PHONY: test
 test: test-image
 	docker run \
diff --git a/test/Dockerfile b/test/Dockerfile
index f93afa4..66fef82 100644
--- a/test/Dockerfile
+++ b/test/Dockerfile
@@ -1,7 +1,7 @@
 FROM debian:buster
 
 RUN apt-get update && \
-    apt-get install -y --force-yes sudo bats git gnupg openssl shellcheck
+    apt-get install -y --force-yes sudo bats git gnupg openssl shellcheck psmisc
 
 RUN useradd -m test -G sudo -s /bin/bash
 RUN echo '%sudo ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers
diff --git a/test/keys/user1.pub.asc b/test/keys/user1.pub.asc
new file mode 100755
index 0000000..9f169f5
--- /dev/null
+++ b/test/keys/user1.pub.asc
@@ -0,0 +1,19 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
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+=+6qs
+-----END PGP PUBLIC KEY BLOCK-----
diff --git a/test/keys/user1.sec.asc b/test/keys/user1.sec.asc
new file mode 100755
index 0000000..9031b5c
--- /dev/null
+++ b/test/keys/user1.sec.asc
@@ -0,0 +1,33 @@
+-----BEGIN PGP PRIVATE KEY BLOCK-----
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+=E0E+
+-----END PGP PRIVATE KEY BLOCK-----
diff --git a/test/keys/user2.pub.asc b/test/keys/user2.pub.asc
new file mode 100755
index 0000000..337e3e0
--- /dev/null
+++ b/test/keys/user2.pub.asc
@@ -0,0 +1,19 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+
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diff --git a/test/keys/user2.sec.asc b/test/keys/user2.sec.asc
new file mode 100755
index 0000000..3be1f02
--- /dev/null
+++ b/test/keys/user2.sec.asc
@@ -0,0 +1,33 @@
+-----BEGIN PGP PRIVATE KEY BLOCK-----
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diff --git a/test/keys/user3.pub.asc b/test/keys/user3.pub.asc
new file mode 100755
index 0000000..265ac02
--- /dev/null
+++ b/test/keys/user3.pub.asc
@@ -0,0 +1,19 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
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+=h20O
+-----END PGP PUBLIC KEY BLOCK-----
diff --git a/test/keys/user3.sec.asc b/test/keys/user3.sec.asc
new file mode 100755
index 0000000..5c150ba
--- /dev/null
+++ b/test/keys/user3.sec.asc
@@ -0,0 +1,33 @@
+-----BEGIN PGP PRIVATE KEY BLOCK-----
+
+lQHYBF+3lQMBBADzBgfdm0+q8SdufnB8PEyoiqB0mgmWpXZvryU0Rukq8211LVLy
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+=Lbg/
+-----END PGP PRIVATE KEY BLOCK-----
diff --git a/test/keys/user4.pub.asc b/test/keys/user4.pub.asc
new file mode 100755
index 0000000..6846f88
--- /dev/null
+++ b/test/keys/user4.pub.asc
@@ -0,0 +1,19 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+
+mI0EX7eVHAEEALzWp0O7qcJOlJ18bIu/uo2rx9hmsGeXim5Ye3WUdQ3fGQTBCTGi
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+GAEKACAWIQQ4OUSpCL9eXRXo7k29PJ3KfDNU6AUCX7eVHAIbDAAKCRC9PJ3KfDNU
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+8ZoOhppmQ0G+/0rccYE0KdxHa6NhCUM3TYsNREmqtlUBOfTETA==
+=c9bG
+-----END PGP PUBLIC KEY BLOCK-----
diff --git a/test/keys/user4.sec.asc b/test/keys/user4.sec.asc
new file mode 100755
index 0000000..ebde10b
--- /dev/null
+++ b/test/keys/user4.sec.asc
@@ -0,0 +1,33 @@
+-----BEGIN PGP PRIVATE KEY BLOCK-----
+
+lQHYBF+3lRwBBAC81qdDu6nCTpSdfGyLv7qNq8fYZrBnl4puWHt1lHUN3xkEwQkx
+ojTTEpjbbOXL4BDw26z9ZNF/lEQHrXIab0uJm34w9V3myAAP6aHKyrpMctBP4erA
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+vM7t+mihpgx/LEbMTs/eNk7HMxVz4DvxTdknSwG8X/VHoBRNvLN8XFtIpGUn04lI
+te8siEUCAPYnWLalY9QcrJE/1Smz8bF4ZhvWth9blfYP/G+kGJKp5qGOXVLZQbof
+IwqtDE5HTSoaeNtZgmqyYY1i6MEWtVsB/jadD9DhTpzldmS+fmHjuiyeXg8yoGkI
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+ciBGb3VyIDx1c2VyNEBleGFtcGxlLmNvbT6IzgQTAQoAOBYhBDg5RKkIv15dFeju
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+o2TXQolLly1+9/OYzlfnTrfZ2+8q4nkS5hacz/oVGhrRYgYNFQARAQABAAP+LZZw
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+oCjaLAX6x40A07OePe0O/Gv7I9Ga0GX6a7psAeohhxQLHgbW/WKi3NVgZY9DVdcC
+AP/MnW8oIOi8ZK1cYnpdKgPjqATlIFG92o5fu65dpf+7EBk4M1aqYqOy78kE0XaN
+KSR35Llu40hzM1Gv31cKvvMCAKhtn+DU8BHhfHMc/rIjzJdXyMdiM6p9i9Vi20Ho
+s7L3ddL4Sp6E0P5EbG/23V0x59/7GZ40I5NJvVDRRBUETIuqaoi2BBgBCgAgFiEE
+ODlEqQi/Xl0V6O5NvTydynwzVOgFAl+3lRwCGwwACgkQvTydynwzVOj+7QQAqivr
+oVLWGqM+54HYg56gxMkXF8T0JyMIP0l4asnQjAxyPR5wSWHN5T1Imt4yEeJnpod2
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+vv9K3HGBNCncR2ujYQlDN02LDURJqrZVATn0xEw=
+=eb7E
+-----END PGP PRIVATE KEY BLOCK-----
diff --git a/test/keys/user5.pub.asc b/test/keys/user5.pub.asc
new file mode 100755
index 0000000..4fca08f
--- /dev/null
+++ b/test/keys/user5.pub.asc
@@ -0,0 +1,19 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+
+mI0EX7eVMwEEALbkQCNVWluL6rsl33a/F1UUvCTGH28AQTV5HAKwgt6VoxsIxlgD
++6Rb5grbNVsG6Ydc1SflxemhI5U1VQ3pvFQOpOuqGVH1V4tZkQMZTTvxQpbcRD4z
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+eTy2TcfqE8JXgzDBNDFx49KZqa1hd9Fvc8bcKypolrxlZcp/Gn45ItwHuHkQOLiN
+BF+3lTMBBAC7VPAQu9lzcvsyksYMvjsvgCtfO/rie2iAcXOaPsGJq5ehCUujKan/
+8GPFLtsO99DOzYF/PIK+McHHzzlP5LetvTPQcWdVIV3EhTY6jRwU4ATK2Z2Gz2ID
+OuAqYEqka6EQsryJWaeWjT6Xnlt9wBZE8pzt0MHZFKRC/6nKaTXXiwARAQABiLYE
+GAEKACAWIQT4OWsR+m4osq7I4asmQKng419xlgUCX7eVMwIbDAAKCRAmQKng419x
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+nEDdKkJPT+nA7EhhUOFlUQRQ49Gu7rlKnP+uGYsiwMvJ1/zl/A==
+=qaXJ
+-----END PGP PUBLIC KEY BLOCK-----
diff --git a/test/keys/user5.sec.asc b/test/keys/user5.sec.asc
new file mode 100755
index 0000000..28c91d2
--- /dev/null
+++ b/test/keys/user5.sec.asc
@@ -0,0 +1,33 @@
+-----BEGIN PGP PRIVATE KEY BLOCK-----
+
+lQHYBF+3lTMBBAC25EAjVVpbi+q7Jd92vxdVFLwkxh9vAEE1eRwCsILelaMbCMZY
+A/ukW+YK2zVbBumHXNUn5cXpoSOVNVUN6bxUDqTrqhlR9VeLWZEDGU078UKW3EQ+
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+TZzRK2QmpdpxC4hTrXNvO3wtiZWjLO3zZIGbrftccjk6nDBssbMYbA6iXLQdVXNl
+ciBGaXZlIDx1c2VyNUBleGFtcGxlLmNvbT6IzgQTAQoAOBYhBPg5axH6biiyrsjh
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+x+oTwleDMME0MXHj0pmprWF30W9zxtwrKmiWvGVlyn8afjki3Ae4eRA4nQHXBF+3
+lTMBBAC7VPAQu9lzcvsyksYMvjsvgCtfO/rie2iAcXOaPsGJq5ehCUujKan/8GPF
+LtsO99DOzYF/PIK+McHHzzlP5LetvTPQcWdVIV3EhTY6jRwU4ATK2Z2Gz2IDOuAq
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+hsjK0yr7VivcSi0eZ3+xqe+19GKvciz6rgI1P4LyZr6kWSJrB5writL8Fs9oqwIA
+5nKqokGvKAEQH96573bSR4UlyxzGsOyvgJn8uh8KA8Nvw5XQ8khzICLNrXGnit09
+/A3yYUuVJ/Hi5yYs0ZcMoQH+NQKroF0iPOW0a88Vo6x3KjnItk34COgWl3W5Zgxv
+Nx8AfKwFdC5UoT7RgW5Ak8TSlBSLiO3+w4/yY1QWdwG2RJsmiLYEGAEKACAWIQT4
+OWsR+m4osq7I4asmQKng419xlgUCX7eVMwIbDAAKCRAmQKng419xlua6A/wIrnVn
+D1JR+EjZWWEA5lRoyyogviWfwPhPaq1v5d/2PWsLZtPgV9gJZ59797MsJ563476o
+bGsvjHqaWB5WtIwJtidQsGllkK5MBZHpOo9Dv+9tBO04YfUKqGdJnEDdKkJPT+nA
+7EhhUOFlUQRQ49Gu7rlKnP+uGYsiwMvJ1/zl/A==
+=Sg1j
+-----END PGP PRIVATE KEY BLOCK-----
diff --git a/test/test.bats b/test/test.bats
index 46156d7..b8ebc86 100644
--- a/test/test.bats
+++ b/test/test.bats
@@ -63,3 +63,38 @@ load test_helper
 	run grep 37d2046a395cbfc .sig/manifest.txt
 	[ "$status" -eq 0 ]
 }
+
+@test "Can verify git repo has signed commits by anyone" {
+	set_identity "user1"
+	echo "test string" > somefile
+	git init
+	git add .
+	git commit -m "initial commit"
+	run sig verify --method git
+	[ "$status" -eq 0 ]
+}
+
+@test "Can verify git repo has signed commits by three different identities" {
+
+	git init
+
+	set_identity "user1"
+	echo "test string 1" > somefile1
+	git add .
+	git commit -m "user1 commit"
+
+	set_identity "user2"
+	echo "test string 2" > somefile2
+	git add .
+	git commit -m "user2 commit"
+
+	set_identity "user3"
+	echo "test string 3" > somefile3
+	git add .
+	git commit -m "user3 commit"
+
+	run sig verify --method git --threshold 3
+	[ "$status" -eq 0 ]
+}
+
+
diff --git a/test/test_helper.bash b/test/test_helper.bash
index eb3118f..f59bb2e 100644
--- a/test/test_helper.bash
+++ b/test/test_helper.bash
@@ -11,6 +11,9 @@ setup(){
 	cp /home/test/sig/sig /tmp/bin/sig
 	export PATH=${bin_dir}:${PATH}
 	cd "$temp_dir" || return 1
+	rm -rf ~/.gnupg
+	rm -rf ~/.gitconfig
+	killall gpg-agent || :
 }
 
 teardown(){
@@ -19,7 +22,20 @@ teardown(){
 
 set_identity(){
 	local -r name="${1?}"
-	echo "set key to $name"
+	killall gpg-agent || :
+	rm -rf ~/.gnupg || :
+	rm -rf ~/.gitconfig || :
+	gpg --import ${HOME}/sig/test/keys/*.pub.asc
+	gpg --import ${HOME}/sig/test/keys/${name}.sec.asc
+	local -r fingerprint=$( \
+		gpg --list-keys --with-colons "${name}" 2>&1 \
+		| awk -F: '$1 == "fpr" {print $10}' \
+		| head -n1 \
+    )
 	git config --global user.email "${name}@example.com"
 	git config --global user.name "${name}"
+	git config --global user.signingKey "${fingerprint}"
+	git config --global commit.gpgSign "true"
+	git config --global merge.gpgSign "true"
+	echo "default-key ${fingerprint}" > ~/.gnupg/gpg.conf
 }