diff --git a/backend/pkg/database/sqlite_repository_test.go b/backend/pkg/database/sqlite_repository_test.go
new file mode 100644
index 00000000..575b0bea
--- /dev/null
+++ b/backend/pkg/database/sqlite_repository_test.go
@@ -0,0 +1,17 @@
+package database
+
+import (
+	sourceModels "github.com/fastenhealth/fasten-sources/clients/models"
+	"github.com/stretchr/testify/require"
+	"testing"
+)
+
+func TestSourceCredentialInterface(t *testing.T) {
+	t.Parallel()
+
+	repo := new(SqliteRepository)
+
+	//assert
+	require.Implements(t, (*sourceModels.DatabaseRepository)(nil), repo, "should implement the DatabaseRepository interface from fasten-sources")
+	require.Implements(t, (*DatabaseRepository)(nil), repo, "should implement the DatabaseRepository interface")
+}
diff --git a/backend/pkg/models/source_credential_test.go b/backend/pkg/models/source_credential_test.go
new file mode 100644
index 00000000..7e9792b8
--- /dev/null
+++ b/backend/pkg/models/source_credential_test.go
@@ -0,0 +1,16 @@
+package models
+
+import (
+	sourceModels "github.com/fastenhealth/fasten-sources/clients/models"
+	"github.com/stretchr/testify/require"
+	"testing"
+)
+
+func TestSourceCredentialInterface(t *testing.T) {
+	t.Parallel()
+
+	sourceCred := new(SourceCredential)
+
+	//assert
+	require.Implements(t, (*sourceModels.SourceCredential)(nil), sourceCred, "should implement the SourceCredential interface from fasten-sources")
+}
diff --git a/go.mod b/go.mod
index 1ceb48cf..678b72bc 100644
--- a/go.mod
+++ b/go.mod
@@ -13,6 +13,7 @@ require (
 	github.com/google/uuid v1.3.0
 	github.com/sirupsen/logrus v1.9.0
 	github.com/spf13/viper v1.12.0
+	github.com/stretchr/testify v1.8.1
 	github.com/urfave/cli/v2 v2.11.2
 	golang.org/x/crypto v0.0.0-20220411220226-7b82a4e95df4
 	golang.org/x/exp v0.0.0-20220303212507-bbda1eaf7a17
@@ -22,6 +23,7 @@ require (
 
 require (
 	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/fastenhealth/gofhir-models v0.0.4 // indirect
 	github.com/fatih/color v1.13.0 // indirect
 	github.com/fsnotify/fsnotify v1.5.4 // indirect
@@ -48,6 +50,7 @@ require (
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/pelletier/go-toml v1.9.5 // indirect
 	github.com/pelletier/go-toml/v2 v2.0.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20200410134404-eec4a21b6bb0 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/samber/lo v1.35.0 // indirect
diff --git a/go.sum b/go.sum
index ff042862..36f35201 100644
--- a/go.sum
+++ b/go.sum
@@ -344,6 +344,8 @@ github.com/spf13/viper v1.12.0/go.mod h1:b6COn30jlNxbm/V2IqWiNWkJ+vZNiMNksliPCiu
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.2.0/go.mod h1:qt09Ya8vawLte6SNmTgCsAVtYtaKzEcn8ATUoHMkEqE=
+github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
+github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
@@ -351,7 +353,9 @@ github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
+github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
 github.com/subosito/gotenv v1.3.0 h1:mjC+YW8QpAdXibNi+vNWgzmgBH4+5l5dCXv8cNysBLI=
 github.com/subosito/gotenv v1.3.0/go.mod h1:YzJjq/33h7nrwdY+iHMhEOEEbW0ovIz0tB6t6PwAXzs=
 github.com/thoas/go-funk v0.9.1 h1:O549iLZqPpTUQ10ykd26sZhzD+rmR5pWhuElrhbC20M=