diff --git a/modules/source-repository/README.md b/modules/source-repository/README.md
index 9beae2447..78a7e7d71 100644
--- a/modules/source-repository/README.md
+++ b/modules/source-repository/README.md
@@ -12,7 +12,7 @@ module "repo" {
   source    e = "./modules/source-repository"
   project_id = "my-project"
   name       = "my-repo"
-  iam_members = {
+  iam = {
     "roles/source.reader" = ["user:foo@example.com"]
   }
 }
@@ -23,9 +23,9 @@ module "repo" {
 
 | name | description | type | required | default |
 |---|---|:---: |:---:|:---:|
-| name | Repository topic name. | <code title="">string</code> | ✓ |  |
+| name | Repository name. | <code title="">string</code> | ✓ |  |
 | project_id | Project used for resources. | <code title="">string</code> | ✓ |  |
-| *iam_members* | IAM members for each topic role. | <code title="map&#40;set&#40;string&#41;&#41;">map(set(string))</code> |  | <code title="">{}</code> |
+| *iam* | IAM bindings in {ROLE => [MEMBERS]} format. | <code title="map&#40;list&#40;string&#41;&#41;">map(list(string))</code> |  | <code title="">{}</code> |
 
 ## Outputs
 
diff --git a/modules/source-repository/main.tf b/modules/source-repository/main.tf
index 71432e16a..f7bea1b1f 100644
--- a/modules/source-repository/main.tf
+++ b/modules/source-repository/main.tf
@@ -20,7 +20,7 @@ resource "google_sourcerepo_repository" "default" {
 }
 
 resource "google_sourcerepo_repository_iam_binding" "default" {
-  for_each   = var.iam_members
+  for_each   = var.iam
   project    = var.project_id
   repository = google_sourcerepo_repository.default.name
   role       = each.key
diff --git a/modules/source-repository/variables.tf b/modules/source-repository/variables.tf
index a7254370f..9d5d0832f 100644
--- a/modules/source-repository/variables.tf
+++ b/modules/source-repository/variables.tf
@@ -19,13 +19,13 @@ variable "project_id" {
   type        = string
 }
 
-variable "iam_members" {
-  description = "IAM members for each topic role."
-  type        = map(set(string))
+variable "iam" {
+  description = "IAM bindings in {ROLE => [MEMBERS]} format."
+  type        = map(list(string))
   default     = {}
 }
 
 variable "name" {
-  description = "Repository topic name."
+  description = "Repository name."
   type        = string
 }
diff --git a/tests/modules/source_repository/__init__.py b/tests/modules/source_repository/__init__.py
new file mode 100644
index 000000000..6913f02e3
--- /dev/null
+++ b/tests/modules/source_repository/__init__.py
@@ -0,0 +1,13 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/tests/modules/source_repository/fixture/main.tf b/tests/modules/source_repository/fixture/main.tf
new file mode 100644
index 000000000..14bb53d92
--- /dev/null
+++ b/tests/modules/source_repository/fixture/main.tf
@@ -0,0 +1,22 @@
+/**
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+module "test" {
+  source     = "../../../../modules/source-repository"
+  project_id = var.project_id
+  name       = var.name
+  iam        = var.iam
+}
diff --git a/tests/modules/source_repository/fixture/variables.tf b/tests/modules/source_repository/fixture/variables.tf
new file mode 100644
index 000000000..dd58ca529
--- /dev/null
+++ b/tests/modules/source_repository/fixture/variables.tf
@@ -0,0 +1,32 @@
+/**
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+variable "project_id" {
+  type    = string
+  default = "test-project"
+}
+
+variable "iam" {
+  type = map(list(string))
+  default = {
+    "roles/source.reader" = ["foo@example.org"]
+  }
+}
+
+variable "name" {
+  type    = string
+  default = "test"
+}
diff --git a/tests/modules/source_repository/test_plan.py b/tests/modules/source_repository/test_plan.py
new file mode 100644
index 000000000..88ff4a69d
--- /dev/null
+++ b/tests/modules/source_repository/test_plan.py
@@ -0,0 +1,39 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+import os
+import pytest
+
+
+FIXTURES_DIR = os.path.join(os.path.dirname(__file__), 'fixture')
+
+
+@pytest.fixture
+def resources(plan_runner):
+  _, resources = plan_runner(FIXTURES_DIR)
+  return resources
+
+
+def test_resource_count(resources):
+  "Test number of resources created."
+  assert len(resources) == 2
+
+
+def test_iam(resources):
+  "Test IAM binding resources."
+  bindings = [r['values'] for r in resources if r['type']
+              == 'google_sourcerepo_repository_iam_binding']
+  assert len(bindings) == 1
+  assert bindings[0]['role'] == 'roles/source.reader'