diff --git a/tests/duplicate_alias.yml b/tests/duplicate_alias.yml
new file mode 100644
index 0000000..7019745
--- /dev/null
+++ b/tests/duplicate_alias.yml
@@ -0,0 +1,23 @@
+sensors:
+- id: 28-000008083108
+  alias: fermenter
+  hightemp: 8
+  lowtemp: 4
+  heatgpio: 5
+  heatinvert: true
+  heatminutes: 5
+  coolgpio: 17
+  coolinvert: false
+  coolminutes: 10
+  verbose: true
+- id: 28-000008083109
+  alias: fermenter
+  hightemp: 8
+  lowtemp: 4
+  heatgpio: 5
+  heatinvert: true
+  heatminutes: 5
+  coolgpio: 17
+  coolinvert: false
+  coolminutes: 10
+  verbose: true
diff --git a/tests/duplicate_id.yml b/tests/duplicate_id.yml
new file mode 100644
index 0000000..f63867d
--- /dev/null
+++ b/tests/duplicate_id.yml
@@ -0,0 +1,23 @@
+sensors:
+- id: 28-000008083108
+  alias: fermenter
+  hightemp: 8
+  lowtemp: 4
+  heatgpio: 5
+  heatinvert: true
+  heatminutes: 5
+  coolgpio: 17
+  coolinvert: false
+  coolminutes: 10
+  verbose: true
+- id: 28-000008083108
+  alias: notduplicate
+  hightemp: 8
+  lowtemp: 4
+  heatgpio: 5
+  heatinvert: true
+  heatminutes: 5
+  coolgpio: 17
+  coolinvert: false
+  coolminutes: 10
+  verbose: true
diff --git a/tests/test_config.yml b/tests/test_config.yml
new file mode 100644
index 0000000..f2ac9d2
--- /dev/null
+++ b/tests/test_config.yml
@@ -0,0 +1,12 @@
+sensors:
+- id: 28-000008083108
+  alias: fermenter
+  hightemp: 8
+  lowtemp: 4
+  heatgpio: 5
+  heatinvert: true
+  heatminutes: 5
+  coolgpio: 17
+  coolinvert: false
+  coolminutes: 10
+  verbose: true