diff --git a/tests/fixtures/config/ansible/git/common-config/zuul.yaml b/tests/fixtures/config/ansible/git/common-config/zuul.yaml
index aa70054..50f353d 100644
--- a/tests/fixtures/config/ansible/git/common-config/zuul.yaml
+++ b/tests/fixtures/config/ansible/git/common-config/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: check
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: patchset-created
@@ -17,8 +16,7 @@
     name: gate
     manager: dependent
     success-message: Build succeeded (gate).
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
@@ -41,7 +39,7 @@
     pre-run: pre
     post-run: post
     vars:
-      flagpath: "{{zuul._test.test_root}}/{{zuul.uuid}}.flag"
+      flagpath: '{{zuul._test.test_root}}/{{zuul.uuid}}.flag'
     roles:
       - zuul: bare-role
 
diff --git a/tests/fixtures/config/ansible/git/org_project/.zuul.yaml b/tests/fixtures/config/ansible/git/org_project/.zuul.yaml
index b38f88e..24ba019 100644
--- a/tests/fixtures/config/ansible/git/org_project/.zuul.yaml
+++ b/tests/fixtures/config/ansible/git/org_project/.zuul.yaml
@@ -4,7 +4,6 @@
 
 - project:
     name: org/project
-
     check:
       jobs:
         - python27
diff --git a/tests/fixtures/config/dependency-graph/git/common-config/playbooks/A.yaml b/tests/fixtures/config/dependency-graph/git/common-config/playbooks/A.yaml
new file mode 100644
index 0000000..f679dce
--- /dev/null
+++ b/tests/fixtures/config/dependency-graph/git/common-config/playbooks/A.yaml
@@ -0,0 +1,2 @@
+- hosts: all
+  tasks: []
diff --git a/tests/fixtures/config/dependency-graph/git/common-config/playbooks/B.yaml b/tests/fixtures/config/dependency-graph/git/common-config/playbooks/B.yaml
new file mode 100644
index 0000000..f679dce
--- /dev/null
+++ b/tests/fixtures/config/dependency-graph/git/common-config/playbooks/B.yaml
@@ -0,0 +1,2 @@
+- hosts: all
+  tasks: []
diff --git a/tests/fixtures/config/dependency-graph/git/common-config/playbooks/C.yaml b/tests/fixtures/config/dependency-graph/git/common-config/playbooks/C.yaml
new file mode 100644
index 0000000..f679dce
--- /dev/null
+++ b/tests/fixtures/config/dependency-graph/git/common-config/playbooks/C.yaml
@@ -0,0 +1,2 @@
+- hosts: all
+  tasks: []
diff --git a/tests/fixtures/config/dependency-graph/git/common-config/playbooks/D.yaml b/tests/fixtures/config/dependency-graph/git/common-config/playbooks/D.yaml
new file mode 100644
index 0000000..f679dce
--- /dev/null
+++ b/tests/fixtures/config/dependency-graph/git/common-config/playbooks/D.yaml
@@ -0,0 +1,2 @@
+- hosts: all
+  tasks: []
diff --git a/tests/fixtures/config/dependency-graph/git/common-config/playbooks/E.yaml b/tests/fixtures/config/dependency-graph/git/common-config/playbooks/E.yaml
new file mode 100644
index 0000000..f679dce
--- /dev/null
+++ b/tests/fixtures/config/dependency-graph/git/common-config/playbooks/E.yaml
@@ -0,0 +1,2 @@
+- hosts: all
+  tasks: []
diff --git a/tests/fixtures/config/dependency-graph/git/common-config/playbooks/F.yaml b/tests/fixtures/config/dependency-graph/git/common-config/playbooks/F.yaml
new file mode 100644
index 0000000..f679dce
--- /dev/null
+++ b/tests/fixtures/config/dependency-graph/git/common-config/playbooks/F.yaml
@@ -0,0 +1,2 @@
+- hosts: all
+  tasks: []
diff --git a/tests/fixtures/config/dependency-graph/git/common-config/playbooks/G.yaml b/tests/fixtures/config/dependency-graph/git/common-config/playbooks/G.yaml
new file mode 100644
index 0000000..f679dce
--- /dev/null
+++ b/tests/fixtures/config/dependency-graph/git/common-config/playbooks/G.yaml
@@ -0,0 +1,2 @@
+- hosts: all
+  tasks: []
diff --git a/tests/fixtures/config/dependency-graph/git/common-config/playbooks/project-test1.yaml b/tests/fixtures/config/dependency-graph/git/common-config/playbooks/project-test1.yaml
new file mode 100644
index 0000000..f679dce
--- /dev/null
+++ b/tests/fixtures/config/dependency-graph/git/common-config/playbooks/project-test1.yaml
@@ -0,0 +1,2 @@
+- hosts: all
+  tasks: []
diff --git a/tests/fixtures/config/dependency-graph/git/common-config/zuul.yaml b/tests/fixtures/config/dependency-graph/git/common-config/zuul.yaml
new file mode 100644
index 0000000..60f3651
--- /dev/null
+++ b/tests/fixtures/config/dependency-graph/git/common-config/zuul.yaml
@@ -0,0 +1,73 @@
+- pipeline:
+    name: gate
+    manager: dependent
+    success-message: Build succeeded (gate).
+    source: gerrit
+    trigger:
+      gerrit:
+        - event: comment-added
+          approval:
+            - approved: 1
+    success:
+      gerrit:
+        verified: 2
+        submit: true
+    failure:
+      gerrit:
+        verified: -2
+    start:
+      gerrit:
+        verified: 0
+    precedence: high
+
+- job:
+    name: A
+
+- job:
+    name: B
+
+- job:
+    name: C
+
+- job:
+    name: D
+
+- job:
+    name: E
+
+- job:
+    name: F
+
+- job:
+    name: G
+
+- project:
+    name: org/project
+    gate:
+      jobs:
+        # Job dependencies, starting with A
+        #     A
+        #    / \
+        #   B   C
+        #  / \ / \
+        # D   F   E
+        #     |
+        #     G
+        # This is intentionally not listed in the natural order to
+        # ensure that we can reference dependencies before they are
+        # defined.
+        - E:
+            dependencies: C
+        - A
+        - B:
+            dependencies: A
+        - C:
+            dependencies: A
+        - F:
+            dependencies:
+              - B
+              - C
+        - D:
+            dependencies: B
+        - G:
+            dependencies: F
diff --git a/tests/fixtures/config/dependency-graph/git/org_project/README b/tests/fixtures/config/dependency-graph/git/org_project/README
new file mode 100644
index 0000000..9daeafb
--- /dev/null
+++ b/tests/fixtures/config/dependency-graph/git/org_project/README
@@ -0,0 +1 @@
+test
diff --git a/tests/fixtures/config/dependency-graph/main.yaml b/tests/fixtures/config/dependency-graph/main.yaml
new file mode 100644
index 0000000..d9868fa
--- /dev/null
+++ b/tests/fixtures/config/dependency-graph/main.yaml
@@ -0,0 +1,8 @@
+- tenant:
+    name: tenant-one
+    source:
+      gerrit:
+        config-repos:
+          - common-config
+        project-repos:
+          - org/project
diff --git a/tests/fixtures/config/duplicate-pipeline/git/common-config/zuul.yaml b/tests/fixtures/config/duplicate-pipeline/git/common-config/zuul.yaml
index bc88b06..5005108 100755
--- a/tests/fixtures/config/duplicate-pipeline/git/common-config/zuul.yaml
+++ b/tests/fixtures/config/duplicate-pipeline/git/common-config/zuul.yaml
@@ -2,8 +2,7 @@
     name: dup1
     manager: independent
     success-message: Build succeeded (dup1).
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: change-restored
@@ -18,8 +17,7 @@
     name: dup2
     manager: independent
     success-message: Build succeeded (dup2).
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: change-restored
@@ -39,7 +37,6 @@
       queue: integrated
       jobs:
         - project-test1
-
     dup2:
       queue: integrated
       jobs:
diff --git a/tests/fixtures/config/in-repo/git/common-config/zuul.yaml b/tests/fixtures/config/in-repo/git/common-config/zuul.yaml
index d8b7200..55169ce 100644
--- a/tests/fixtures/config/in-repo/git/common-config/zuul.yaml
+++ b/tests/fixtures/config/in-repo/git/common-config/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: check
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: patchset-created
@@ -17,8 +16,7 @@
     name: tenant-one-gate
     manager: dependent
     success-message: Build succeeded (tenant-one-gate).
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
diff --git a/tests/fixtures/config/merges/git/common-config/zuul.yaml b/tests/fixtures/config/merges/git/common-config/zuul.yaml
index bb91f3a..ab4e24c 100644
--- a/tests/fixtures/config/merges/git/common-config/zuul.yaml
+++ b/tests/fixtures/config/merges/git/common-config/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: check
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: patchset-created
@@ -17,8 +16,7 @@
     name: gate
     manager: dependent
     success-message: Build succeeded (gate).
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
@@ -37,16 +35,13 @@
     precedence: high
 
 - job:
-    name:
-      project-test1
+    name: project-test1
 
 - job:
-    name:
-      project-test2
+    name: project-test2
 
 - job:
-    name:
-      project-merge
+    name: project-merge
     hold-following-changes: true
 
 - project:
@@ -75,6 +70,6 @@
     merge-mode: cherry-pick
     gate:
       jobs:
-        - project-merge:
-            jobs:
-              - project-test1
+        - project-merge
+        - project-test1:
+            dependencies: project-merge
diff --git a/tests/fixtures/config/multi-tenant/git/common-config/zuul.yaml b/tests/fixtures/config/multi-tenant/git/common-config/zuul.yaml
index 08117d6..004f2df 100644
--- a/tests/fixtures/config/multi-tenant/git/common-config/zuul.yaml
+++ b/tests/fixtures/config/multi-tenant/git/common-config/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: check
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: patchset-created
@@ -14,8 +13,7 @@
         verified: -1
 
 - job:
-    name:
-      python27
+    name: python27
     nodes:
       - name: controller
         image: ubuntu-trusty
diff --git a/tests/fixtures/config/multi-tenant/git/tenant-one-config/zuul.yaml b/tests/fixtures/config/multi-tenant/git/tenant-one-config/zuul.yaml
index 4a653f6..5769cf5 100644
--- a/tests/fixtures/config/multi-tenant/git/tenant-one-config/zuul.yaml
+++ b/tests/fixtures/config/multi-tenant/git/tenant-one-config/zuul.yaml
@@ -2,8 +2,7 @@
     name: tenant-one-gate
     manager: dependent
     success-message: Build succeeded (tenant-one-gate).
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
@@ -28,8 +27,7 @@
         image: controller-image
 
 - job:
-    name:
-      project1-test1
+    name: project1-test1
 
 - project:
     name: org/project1
diff --git a/tests/fixtures/config/multi-tenant/git/tenant-two-config/zuul.yaml b/tests/fixtures/config/multi-tenant/git/tenant-two-config/zuul.yaml
index 7c79720..19782ce 100644
--- a/tests/fixtures/config/multi-tenant/git/tenant-two-config/zuul.yaml
+++ b/tests/fixtures/config/multi-tenant/git/tenant-two-config/zuul.yaml
@@ -2,8 +2,7 @@
     name: tenant-two-gate
     manager: dependent
     success-message: Build succeeded (tenant-two-gate).
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
@@ -28,8 +27,7 @@
         image: controller-image
 
 - job:
-    name:
-      project2-test1
+    name: project2-test1
 
 - project:
     name: org/project2
diff --git a/tests/fixtures/config/one-job-project/git/common-config/zuul.yaml b/tests/fixtures/config/one-job-project/git/common-config/zuul.yaml
index 148ba42..4579062 100644
--- a/tests/fixtures/config/one-job-project/git/common-config/zuul.yaml
+++ b/tests/fixtures/config/one-job-project/git/common-config/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: check
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: patchset-created
@@ -17,8 +16,7 @@
     name: gate
     manager: dependent
     success-message: Build succeeded (gate).
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
@@ -39,8 +37,7 @@
 - pipeline:
     name: post
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: ref-updated
diff --git a/tests/fixtures/config/openstack/git/project-config/zuul.yaml b/tests/fixtures/config/openstack/git/project-config/zuul.yaml
index 420d979..760adb8 100644
--- a/tests/fixtures/config/openstack/git/project-config/zuul.yaml
+++ b/tests/fixtures/config/openstack/git/project-config/zuul.yaml
@@ -1,11 +1,8 @@
-# Pipeline definitions
-
 - pipeline:
     name: check
     manager: independent
     success-message: Build succeeded (check).
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: patchset-created
@@ -20,8 +17,7 @@
     name: gate
     manager: dependent
     success-message: Build succeeded (gate).
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
@@ -39,8 +35,6 @@
         verified: 0
     precedence: high
 
-# Job definitions
-
 - job:
     name: base
     timeout: 30
@@ -78,8 +72,6 @@
       - openstack/keystone
       - openstack/nova
 
-# Project definitions
-
 - project:
     name: openstack/nova
     templates:
diff --git a/tests/fixtures/config/requirements/email/git/common-config/zuul.yaml b/tests/fixtures/config/requirements/email/git/common-config/zuul.yaml
index 09e0cc6..78d2a18 100644
--- a/tests/fixtures/config/requirements/email/git/common-config/zuul.yaml
+++ b/tests/fixtures/config/requirements/email/git/common-config/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: pipeline
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
@@ -19,8 +18,7 @@
 - pipeline:
     name: trigger
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
diff --git a/tests/fixtures/config/requirements/newer-than/git/common-config/zuul.yaml b/tests/fixtures/config/requirements/newer-than/git/common-config/zuul.yaml
index cd76afd..1e84e18 100644
--- a/tests/fixtures/config/requirements/newer-than/git/common-config/zuul.yaml
+++ b/tests/fixtures/config/requirements/newer-than/git/common-config/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: pipeline
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
@@ -20,8 +19,7 @@
 - pipeline:
     name: trigger
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
diff --git a/tests/fixtures/config/requirements/older-than/git/common-config/zuul.yaml b/tests/fixtures/config/requirements/older-than/git/common-config/zuul.yaml
index 8dca5e6..efbd79a 100644
--- a/tests/fixtures/config/requirements/older-than/git/common-config/zuul.yaml
+++ b/tests/fixtures/config/requirements/older-than/git/common-config/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: pipeline
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
@@ -20,8 +19,7 @@
 - pipeline:
     name: trigger
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
diff --git a/tests/fixtures/config/requirements/reject-username/git/common-config/zuul.yaml b/tests/fixtures/config/requirements/reject-username/git/common-config/zuul.yaml
index 92c7de2..7212944 100644
--- a/tests/fixtures/config/requirements/reject-username/git/common-config/zuul.yaml
+++ b/tests/fixtures/config/requirements/reject-username/git/common-config/zuul.yaml
@@ -1,11 +1,10 @@
 - pipeline:
     name: pipeline
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     reject:
       approval:
-        - username: 'jenkins'
+        - username: jenkins
     trigger:
       gerrit:
         - event: comment-added
@@ -19,13 +18,12 @@
 - pipeline:
     name: trigger
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
           reject-approval:
-            - username: 'jenkins'
+            - username: jenkins
     success:
       gerrit:
         verified: 1
diff --git a/tests/fixtures/config/requirements/reject/git/common-config/zuul.yaml b/tests/fixtures/config/requirements/reject/git/common-config/zuul.yaml
index 12a2538..9f5b125 100644
--- a/tests/fixtures/config/requirements/reject/git/common-config/zuul.yaml
+++ b/tests/fixtures/config/requirements/reject/git/common-config/zuul.yaml
@@ -1,15 +1,18 @@
 - pipeline:
     name: pipeline
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     require:
       approval:
         - username: jenkins
-          verified: [1, 2]
+          verified:
+            - 1
+            - 2
     reject:
       approval:
-        - verified: [-1, -2]
+        - verified:
+            - -1
+            - -2
     trigger:
       gerrit:
         - event: comment-added
@@ -23,16 +26,19 @@
 - pipeline:
     name: trigger
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
           require-approval:
             - username: jenkins
-              verified: [1, 2]
+              verified:
+                - 1
+                - 2
           reject-approval:
-            - verified: [-1, -2]
+            - verified:
+                - -1
+                - -2
     success:
       gerrit:
         verified: 1
diff --git a/tests/fixtures/config/requirements/state/git/common-config/zuul.yaml b/tests/fixtures/config/requirements/state/git/common-config/zuul.yaml
index 9491bff..01ceb46 100644
--- a/tests/fixtures/config/requirements/state/git/common-config/zuul.yaml
+++ b/tests/fixtures/config/requirements/state/git/common-config/zuul.yaml
@@ -1,10 +1,9 @@
 - pipeline:
     name: current-check
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     require:
-      current-patchset: True
+      current-patchset: true
     trigger:
       gerrit:
         - event: patchset-created
@@ -19,10 +18,9 @@
 - pipeline:
     name: open-check
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     require:
-      open: True
+      open: true
     trigger:
       gerrit:
         - event: patchset-created
@@ -37,8 +35,7 @@
 - pipeline:
     name: status-check
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     require:
       status: NEW
     trigger:
diff --git a/tests/fixtures/config/requirements/username/git/common-config/zuul.yaml b/tests/fixtures/config/requirements/username/git/common-config/zuul.yaml
index ca2ff97..9789e71 100644
--- a/tests/fixtures/config/requirements/username/git/common-config/zuul.yaml
+++ b/tests/fixtures/config/requirements/username/git/common-config/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: pipeline
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
@@ -19,8 +18,7 @@
 - pipeline:
     name: trigger
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
diff --git a/tests/fixtures/config/requirements/vote1/git/common-config/zuul.yaml b/tests/fixtures/config/requirements/vote1/git/common-config/zuul.yaml
index 00afe79..7989363 100644
--- a/tests/fixtures/config/requirements/vote1/git/common-config/zuul.yaml
+++ b/tests/fixtures/config/requirements/vote1/git/common-config/zuul.yaml
@@ -1,4 +1,3 @@
-
 - pipeline:
     name: pipeline
     manager: independent
@@ -6,8 +5,7 @@
       approval:
         - username: jenkins
           verified: 1
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
@@ -21,8 +19,7 @@
 - pipeline:
     name: trigger
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
diff --git a/tests/fixtures/config/requirements/vote2/git/common-config/zuul.yaml b/tests/fixtures/config/requirements/vote2/git/common-config/zuul.yaml
index 73db7a7..9348afb 100644
--- a/tests/fixtures/config/requirements/vote2/git/common-config/zuul.yaml
+++ b/tests/fixtures/config/requirements/vote2/git/common-config/zuul.yaml
@@ -4,9 +4,10 @@
     require:
       approval:
         - username: jenkins
-          verified: [1, 2]
-    source:
-      gerrit
+          verified:
+            - 1
+            - 2
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
@@ -20,14 +21,15 @@
 - pipeline:
     name: trigger
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
           require-approval:
             - username: jenkins
-              verified: [1, 2]
+              verified:
+                - 1
+                - 2
     success:
       gerrit:
         verified: 1
diff --git a/tests/fixtures/config/single-tenant/git/common-config/zuul.yaml b/tests/fixtures/config/single-tenant/git/common-config/zuul.yaml
index b91bf6f..47c173d 100644
--- a/tests/fixtures/config/single-tenant/git/common-config/zuul.yaml
+++ b/tests/fixtures/config/single-tenant/git/common-config/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: check
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: patchset-created
@@ -17,8 +16,7 @@
     name: gate
     manager: dependent
     success-message: Build succeeded (gate).
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
@@ -39,8 +37,7 @@
 - pipeline:
     name: post
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: ref-updated
@@ -49,8 +46,7 @@
 - pipeline:
     name: experimental
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: patchset-created
@@ -107,23 +103,26 @@
 - job:
     name: project-testfile
     files:
-      - '.*-requires'
+      - .*-requires
 
 - project:
     name: org/project
     check:
       jobs:
-        - project-merge:
-            jobs:
-              - project-test1
-              - project-test2
+        - project-merge
+        - project-test1:
+            dependencies: project-merge
+        - project-test2:
+            dependencies: project-merge
     gate:
       jobs:
-        - project-merge:
-            jobs:
-              - project-test1
-              - project-test2
-              - project-testfile
+        - project-merge
+        - project-test1:
+            dependencies: project-merge
+        - project-test2:
+            dependencies: project-merge
+        - project-testfile:
+            dependencies: project-merge
     post:
       jobs:
         - project-post
@@ -132,48 +131,58 @@
     name: org/project1
     check:
       jobs:
-        - project-merge:
-            jobs:
-              - project-test1
-              - project-test2
-              - project1-project2-integration
+        - project-merge
+        - project-test1:
+            dependencies: project-merge
+        - project-test2:
+            dependencies: project-merge
+        - project1-project2-integration:
+            dependencies: project-merge
     gate:
       queue: integrated
       jobs:
-        - project-merge:
-            jobs:
-              - project-test1
-              - project-test2
-              - project1-project2-integration
+        - project-merge
+        - project-test1:
+            dependencies: project-merge
+        - project-test2:
+            dependencies: project-merge
+        - project1-project2-integration:
+            dependencies: project-merge
 
 - project:
     name: org/project2
     gate:
       queue: integrated
       jobs:
-        - project-merge:
-            jobs:
-              - project-test1
-              - project-test2
-              - project1-project2-integration
+        - project-merge
+        - project-test1:
+            dependencies: project-merge
+        - project-test2:
+            dependencies: project-merge
+        - project1-project2-integration:
+            dependencies: project-merge
 
 - project:
     name: org/project3
     check:
       jobs:
-        - project-merge:
-            jobs:
-              - project-test1
-              - project-test2
-              - project1-project2-integration
+        - project-merge
+        - project-test1:
+            dependencies: project-merge
+        - project-test2:
+            dependencies: project-merge
+        - project1-project2-integration:
+            dependencies: project-merge
     gate:
       queue: integrated
       jobs:
-        - project-merge:
-            jobs:
-              - project-test1
-              - project-test2
-              - project1-project2-integration
+        - project-merge
+        - project-test1:
+            dependencies: project-merge
+        - project-test2:
+            dependencies: project-merge
+        - project1-project2-integration:
+            dependencies: project-merge
     post:
       jobs:
         - project-post
@@ -182,9 +191,9 @@
     name: org/experimental-project
     experimental:
       jobs:
-        - project-merge:
-            jobs:
-              - experimental-project-test
+        - project-merge
+        - experimental-project-test:
+            dependencies: project-merge
 
 - project:
     name: org/noop-project
@@ -199,16 +208,18 @@
     name: org/nonvoting-project
     check:
       jobs:
-        - nonvoting-project-merge:
-            jobs:
-              - nonvoting-project-test1
-              - nonvoting-project-test2
+        - nonvoting-project-merge
+        - nonvoting-project-test1:
+            dependencies: nonvoting-project-merge
+        - nonvoting-project-test2:
+            dependencies: nonvoting-project-merge
     gate:
       jobs:
-        - nonvoting-project-merge:
-            jobs:
-              - nonvoting-project-test1
-              - nonvoting-project-test2
+        - nonvoting-project-merge
+        - nonvoting-project-test1:
+            dependencies: nonvoting-project-merge
+        - nonvoting-project-test2:
+            dependencies: nonvoting-project-merge
 
 - project:
     name: org/no-jobs-project
diff --git a/tests/fixtures/config/single-tenant/git/layout-disabled-at/zuul.yaml b/tests/fixtures/config/single-tenant/git/layout-disabled-at/zuul.yaml
index 4cf6f16..bdc19ac 100644
--- a/tests/fixtures/config/single-tenant/git/layout-disabled-at/zuul.yaml
+++ b/tests/fixtures/config/single-tenant/git/layout-disabled-at/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: check
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: patchset-created
diff --git a/tests/fixtures/config/single-tenant/git/layout-dont-ignore-ref-deletes/zuul.yaml b/tests/fixtures/config/single-tenant/git/layout-dont-ignore-ref-deletes/zuul.yaml
index 30e574a..334d9ac 100644
--- a/tests/fixtures/config/single-tenant/git/layout-dont-ignore-ref-deletes/zuul.yaml
+++ b/tests/fixtures/config/single-tenant/git/layout-dont-ignore-ref-deletes/zuul.yaml
@@ -1,13 +1,12 @@
 - pipeline:
     name: post
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: ref-updated
           ref: ^(?!refs/).*$
-          ignore-deletes: False
+          ignore-deletes: false
 
 - job:
     name: project-post
@@ -20,4 +19,3 @@
     post:
       jobs:
         - project-post
-
diff --git a/tests/fixtures/config/single-tenant/git/layout-footer-message/zuul.yaml b/tests/fixtures/config/single-tenant/git/layout-footer-message/zuul.yaml
index 0c04070..c698378 100644
--- a/tests/fixtures/config/single-tenant/git/layout-footer-message/zuul.yaml
+++ b/tests/fixtures/config/single-tenant/git/layout-footer-message/zuul.yaml
@@ -2,8 +2,7 @@
     name: gate
     manager: dependent
     success-message: Build succeeded (gate).
-    source:
-      gerrit
+    source: gerrit
     failure-message: Build failed.  For information on how to proceed, see http://wiki.example.org/Test_Failures
     footer-message: For CI problems and help debugging, contact ci@example.org
     trigger:
@@ -35,4 +34,3 @@
     gate:
       jobs:
         - project-test1
-
diff --git a/tests/fixtures/config/single-tenant/git/layout-idle/zuul.yaml b/tests/fixtures/config/single-tenant/git/layout-idle/zuul.yaml
index f71f3e4..d1fa04b 100644
--- a/tests/fixtures/config/single-tenant/git/layout-idle/zuul.yaml
+++ b/tests/fixtures/config/single-tenant/git/layout-idle/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: periodic
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       timer:
         - time: '* * * * * */1'
diff --git a/tests/fixtures/config/single-tenant/git/layout-inheritance/zuul.yaml b/tests/fixtures/config/single-tenant/git/layout-inheritance/zuul.yaml
index 3070af0..ab8c9a5 100644
--- a/tests/fixtures/config/single-tenant/git/layout-inheritance/zuul.yaml
+++ b/tests/fixtures/config/single-tenant/git/layout-inheritance/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: check
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: patchset-created
@@ -13,7 +12,6 @@
       gerrit:
         verified: -1
 
-
 - job:
     name: project-test-irrelevant-starts-empty
 
diff --git a/tests/fixtures/config/single-tenant/git/layout-irrelevant-files/zuul.yaml b/tests/fixtures/config/single-tenant/git/layout-irrelevant-files/zuul.yaml
index f243bcc..5d72fc0 100644
--- a/tests/fixtures/config/single-tenant/git/layout-irrelevant-files/zuul.yaml
+++ b/tests/fixtures/config/single-tenant/git/layout-irrelevant-files/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: check
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: patchset-created
@@ -13,7 +12,6 @@
       gerrit:
         verified: -1
 
-
 - job:
     name: project-test-irrelevant-files
 
diff --git a/tests/fixtures/config/single-tenant/git/layout-mutex-reconfiguration/zuul.yaml b/tests/fixtures/config/single-tenant/git/layout-mutex-reconfiguration/zuul.yaml
index 12f1747..0e332e4 100644
--- a/tests/fixtures/config/single-tenant/git/layout-mutex-reconfiguration/zuul.yaml
+++ b/tests/fixtures/config/single-tenant/git/layout-mutex-reconfiguration/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: check
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: patchset-created
diff --git a/tests/fixtures/config/single-tenant/git/layout-mutex/zuul.yaml b/tests/fixtures/config/single-tenant/git/layout-mutex/zuul.yaml
index e91903a..bb92b7a 100644
--- a/tests/fixtures/config/single-tenant/git/layout-mutex/zuul.yaml
+++ b/tests/fixtures/config/single-tenant/git/layout-mutex/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: check
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: patchset-created
diff --git a/tests/fixtures/config/single-tenant/git/layout-no-timer/zuul.yaml b/tests/fixtures/config/single-tenant/git/layout-no-timer/zuul.yaml
index f754e37..ab919a4 100644
--- a/tests/fixtures/config/single-tenant/git/layout-no-timer/zuul.yaml
+++ b/tests/fixtures/config/single-tenant/git/layout-no-timer/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: check
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: patchset-created
@@ -18,8 +17,7 @@
     manager: independent
     # Trigger is required, set it to one that is a noop
     # during tests that check the timer trigger.
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: ref-updated
diff --git a/tests/fixtures/config/single-tenant/git/layout-repo-deleted/zuul.yaml b/tests/fixtures/config/single-tenant/git/layout-repo-deleted/zuul.yaml
index 2bffc3e..5851d75 100644
--- a/tests/fixtures/config/single-tenant/git/layout-repo-deleted/zuul.yaml
+++ b/tests/fixtures/config/single-tenant/git/layout-repo-deleted/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: check
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: patchset-created
@@ -17,8 +16,7 @@
     name: gate
     manager: dependent
     success-message: Build succeeded (gate).
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
@@ -60,13 +58,15 @@
     name: org/delete-project
     check:
       jobs:
-        - project-merge:
-            jobs:
-              - project-test1
-              - project-test2
+        - project-merge
+        - project-test1:
+            dependencies: project-merge
+        - project-test2:
+            dependencies: project-merge
     gate:
       jobs:
-        - project-merge:
-            jobs:
-              - project-test1
-              - project-test2
+        - project-merge
+        - project-test1:
+            dependencies: project-merge
+        - project-test2:
+            dependencies: project-merge
diff --git a/tests/fixtures/config/single-tenant/git/layout-smtp/zuul.yaml b/tests/fixtures/config/single-tenant/git/layout-smtp/zuul.yaml
index 9effb1f..be90d48 100644
--- a/tests/fixtures/config/single-tenant/git/layout-smtp/zuul.yaml
+++ b/tests/fixtures/config/single-tenant/git/layout-smtp/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: check
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: patchset-created
@@ -23,8 +22,7 @@
     name: gate
     manager: dependent
     success-message: Build succeeded (gate).
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
@@ -69,13 +67,15 @@
     name: org/project
     check:
       jobs:
-        - project-merge:
-            jobs:
-              - project-test1
-              - project-test2
+        - project-merge
+        - project-test1:
+            dependencies: project-merge
+        - project-test2:
+            dependencies: project-merge
     gate:
       jobs:
-        - project-merge:
-            jobs:
-              - project-test1
-              - project-test2
+        - project-merge
+        - project-test1:
+            dependencies: project-merge
+        - project-test2:
+            dependencies: project-merge
diff --git a/tests/fixtures/config/single-tenant/git/layout-tags/zuul.yaml b/tests/fixtures/config/single-tenant/git/layout-tags/zuul.yaml
index c921c90..07f0657 100644
--- a/tests/fixtures/config/single-tenant/git/layout-tags/zuul.yaml
+++ b/tests/fixtures/config/single-tenant/git/layout-tags/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: check
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: patchset-created
@@ -34,19 +33,23 @@
     check:
       jobs:
         - merge:
-            jobs:
-              - test1
-              - test2
-              - integration
             tags:
               - extratag
+        - test1:
+            dependencies: merge
+        - test2:
+            dependencies: merge
+        - integration:
+            dependencies: merge
 
 - project:
     name: org/project2
     check:
       jobs:
-        - merge:
-            jobs:
-              - test1
-              - test2
-              - integration
+        - merge
+        - test1:
+            dependencies: merge
+        - test2:
+            dependencies: merge
+        - integration:
+            dependencies: merge
diff --git a/tests/fixtures/config/single-tenant/git/layout-timer-smtp/zuul.yaml b/tests/fixtures/config/single-tenant/git/layout-timer-smtp/zuul.yaml
index 4a14107..2a2eca5 100644
--- a/tests/fixtures/config/single-tenant/git/layout-timer-smtp/zuul.yaml
+++ b/tests/fixtures/config/single-tenant/git/layout-timer-smtp/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: periodic
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       timer:
         - time: '* * * * * */1'
@@ -10,7 +9,7 @@
       smtp:
         to: alternative_me@example.com
         from: zuul_from@example.com
-        subject: 'Periodic check for {change.project} succeeded'
+        subject: Periodic check for {change.project} succeeded
 
 - job:
     name: project-bitrot-stable-old
diff --git a/tests/fixtures/config/single-tenant/git/layout-timer/zuul.yaml b/tests/fixtures/config/single-tenant/git/layout-timer/zuul.yaml
index f69a91d..8072644 100644
--- a/tests/fixtures/config/single-tenant/git/layout-timer/zuul.yaml
+++ b/tests/fixtures/config/single-tenant/git/layout-timer/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: check
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: patchset-created
@@ -16,8 +15,7 @@
 - pipeline:
     name: periodic
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       timer:
         - time: '* * * * * */1'
diff --git a/tests/fixtures/config/success-url/git/common-config/zuul.yaml b/tests/fixtures/config/success-url/git/common-config/zuul.yaml
index 7edb340..f2d5251 100644
--- a/tests/fixtures/config/success-url/git/common-config/zuul.yaml
+++ b/tests/fixtures/config/success-url/git/common-config/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: check
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: patchset-created
@@ -18,7 +17,6 @@
       gerrit:
         verified: -1
 
-
 - job:
     name: docs-draft-test
     success-url: http://docs-draft.example.org/{build.parameters[LOG_PATH]}/publish-docs/
diff --git a/tests/fixtures/config/templated-project/git/common-config/zuul.yaml b/tests/fixtures/config/templated-project/git/common-config/zuul.yaml
index 22a2d6d..8d2c8a0 100644
--- a/tests/fixtures/config/templated-project/git/common-config/zuul.yaml
+++ b/tests/fixtures/config/templated-project/git/common-config/zuul.yaml
@@ -1,8 +1,7 @@
 - pipeline:
     name: check
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: patchset-created
@@ -17,8 +16,7 @@
     name: gate
     manager: dependent
     success-message: Build succeeded (gate).
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: comment-added
@@ -39,8 +37,7 @@
 - pipeline:
     name: post
     manager: independent
-    source:
-      gerrit
+    source: gerrit
     trigger:
       gerrit:
         - event: ref-updated
@@ -56,15 +53,15 @@
 - project-template:
     name: test-three-and-four
     check:
-       jobs:
-         - layered-project-test3
-         - layered-project-test4
+      jobs:
+        - layered-project-test3
+        - layered-project-test4
 
 - project-template:
     name: test-five
     check:
       jobs:
-         - layered-project-foo-test5
+        - layered-project-foo-test5
 
 - job:
     name: project-test1