diff --git a/.github/scripts/integration-test-matrix.js b/.github/scripts/integration-test-matrix.js
index b3190206f..a138ac469 100644
--- a/.github/scripts/integration-test-matrix.js
+++ b/.github/scripts/integration-test-matrix.js
@@ -8,47 +8,39 @@ module.exports = ({ context }) => {
     // `changes` is a list of adapter names that have related
     // file changes in the PR
     // ex: ['postgres', 'snowflake']
-    const changes = JSON.parse(process.env.CHANGES);
     const labels = context.payload.pull_request.labels.map(({ name }) => name);
     console.log("labels", labels);
-    console.log("changes", changes);
     const testAllLabel = labels.includes("test all");
     const include = [];
 
     for (const adapter of supportedAdapters) {
-      if (
-        changes.includes(adapter) ||
-        testAllLabel ||
-        labels.includes(`test ${adapter}`)
-      ) {
-        for (const pythonVersion of supportedPythonVersions) {
-          if (
-            pythonVersion === defaultPythonVersion ||
-            labels.includes(`test python${pythonVersion}`) ||
-            testAllLabel
-          ) {
-            // always run tests on ubuntu by default
+      for (const pythonVersion of supportedPythonVersions) {
+        if (
+          pythonVersion === defaultPythonVersion ||
+          labels.includes(`test python${pythonVersion}`) ||
+          testAllLabel
+        ) {
+          // always run tests on ubuntu by default
+          include.push({
+            os: "ubuntu-latest",
+            adapter,
+            "python-version": pythonVersion,
+          });
+
+          if (labels.includes("test windows") || testAllLabel) {
             include.push({
-              os: "ubuntu-latest",
+              os: "windows-latest",
               adapter,
               "python-version": pythonVersion,
             });
+          }
 
-            if (labels.includes("test windows") || testAllLabel) {
-              include.push({
-                os: "windows-latest",
-                adapter,
-                "python-version": pythonVersion,
-              });
-            }
-
-            if (labels.includes("test macos") || testAllLabel) {
-              include.push({
-                os: "macos-latest",
-                adapter,
-                "python-version": pythonVersion,
-              });
-            }
+          if (labels.includes("test macos") || testAllLabel) {
+            include.push({
+              os: "macos-latest",
+              adapter,
+              "python-version": pythonVersion,
+            });
           }
         }
       }
diff --git a/.github/workflows/integration.yml b/.github/workflows/integration.yml
index 278e85bf5..4964d10bf 100644
--- a/.github/workflows/integration.yml
+++ b/.github/workflows/integration.yml
@@ -33,6 +33,9 @@ on:
   pull_request_target:
   # manual trigger
   workflow_dispatch:
+  # run this once per night to ensure no regressions from latest dbt-core changes
+  schedule:
+    - cron: '0 5 * * *' # 5 UTC
 
 # explicitly turn off permissions for `GITHUB_TOKEN`
 permissions: read-all
@@ -74,21 +77,6 @@ jobs:
           persist-credentials: false
           ref: ${{ github.event.pull_request.head.sha }}
 
-      - name: Check if relevant files changed
-        # https://github.com/marketplace/actions/paths-changes-filter
-        # For each filter, it sets output variable named by the filter to the text:
-        #  'true' - if any of changed files matches any of filter rules
-        #  'false' - if none of changed files matches any of filter rules
-        # also, returns:
-        #  `changes` - JSON array with names of all filters matching any of the changed files
-        uses: dorny/paths-filter@v2
-        id: get-changes
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-          filters: |
-            redshift:
-              - 'dbt/**'
-              - 'tests/**'
       - name: Generate integration test matrix
         id: generate-matrix
         uses: actions/github-script@v4
diff --git a/dev_requirements.txt b/dev_requirements.txt
index 7b29eb359..76d4f8427 100644
--- a/dev_requirements.txt
+++ b/dev_requirements.txt
@@ -1,7 +1,7 @@
 # install latest changes in dbt-core + dbt-postgres
-# TODO: how to automate switching from develop to version branches?
-git+https://github.com/dbt-labs/dbt.git@develop#egg=dbt-core&subdirectory=core
-git+https://github.com/dbt-labs/dbt.git@develop#egg=dbt-postgres&subdirectory=plugins/postgres
+# TODO: how to switch from HEAD to x.y.latest branches after minor releases?
+git+https://github.com/dbt-labs/dbt.git#egg=dbt-core&subdirectory=core
+git+https://github.com/dbt-labs/dbt.git#egg=dbt-postgres&subdirectory=plugins/postgres
 
 bumpversion
 flake8
diff --git a/tests/unit/test_context.py b/tests/unit/test_context.py
index b6598a224..12f250b71 100644
--- a/tests/unit/test_context.py
+++ b/tests/unit/test_context.py
@@ -446,16 +446,20 @@ def test_resolve_specific(config, manifest_extended, redshift_adapter, get_inclu
         manifest=manifest_extended,
     )
 
+    ctx['adapter'].config.dispatch
+
     # macro_a exists, but default__macro_a and redshift__macro_a do not
     with pytest.raises(dbt.exceptions.CompilationException):
         ctx['adapter'].dispatch('macro_a').macro
-
+    
     assert ctx['adapter'].dispatch('some_macro').macro is package_rs_macro
-    assert ctx['adapter'].dispatch('some_macro', packages=[
-                                   'dbt']).macro is rs_macro
-    assert ctx['adapter'].dispatch('some_macro', packages=[
-                                   'root']).macro is package_rs_macro
-    assert ctx['adapter'].dispatch('some_macro', packages=[
-                                   'root', 'dbt']).macro is package_rs_macro
-    assert ctx['adapter'].dispatch('some_macro', packages=[
-                                   'dbt', 'root']).macro is rs_macro
+    assert ctx['adapter'].dispatch('some_macro', 'dbt').macro is rs_macro
+    assert ctx['adapter'].dispatch('some_macro', 'root').macro is package_rs_macro
+    
+    # override 'dbt' namespace, dispatch to 'root' first
+    ctx['adapter'].config.dispatch = [{'macro_namespace': 'dbt', 'search_order': ['root', 'dbt']}]
+    assert ctx['adapter'].dispatch('some_macro', macro_namespace = 'dbt').macro is package_rs_macro
+    
+    # override 'root' namespace, dispatch to 'dbt' first
+    ctx['adapter'].config.dispatch = [{'macro_namespace': 'root', 'search_order': ['dbt', 'root']}]
+    assert ctx['adapter'].dispatch('some_macro', macro_namespace='root').macro is rs_macro