diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index ef832ed8cbf0..4bfbbeb60ed0 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -19,8 +19,8 @@ jobs:
       - name: Run coverage
         run: go test -coverprofile=coverage.out -coverpkg=./... ./...
 
-      - name: Run coverage with new pickfirst
-        run: GRPC_EXPERIMENTAL_ENABLE_NEW_PICK_FIRST=true go test -coverprofile=coverage_new_pickfirst.out -coverpkg=./... ./...
+      - name: Run coverage with other pickfirst
+        run: GRPC_EXPERIMENTAL_ENABLE_NEW_PICK_FIRST=false go test -coverprofile=coverage_other_pickfirst.out -coverpkg=./... ./...
 
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v4
diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index f4c329580890..4a8cd29e68ea 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -69,7 +69,7 @@ jobs:
           - type: tests
             goversion: '1.24'
             testflags: -race
-            grpcenv: 'GRPC_EXPERIMENTAL_ENABLE_NEW_PICK_FIRST=true'
+            grpcenv: 'GRPC_EXPERIMENTAL_ENABLE_NEW_PICK_FIRST=false'
 
     steps:
       # Setup the environment.
diff --git a/internal/envconfig/envconfig.go b/internal/envconfig/envconfig.go
index 1e42b6fdc872..9bc13c01c2d9 100644
--- a/internal/envconfig/envconfig.go
+++ b/internal/envconfig/envconfig.go
@@ -51,10 +51,10 @@ var (
 	// xDS server in the list of server configs will be used.
 	XDSFallbackSupport = boolFromEnv("GRPC_EXPERIMENTAL_XDS_FALLBACK", true)
 	// NewPickFirstEnabled is set if the new pickfirst leaf policy is to be used
-	// instead of the exiting pickfirst implementation. This can be enabled by
+	// instead of the exiting pickfirst implementation. This can be disabled by
 	// setting the environment variable "GRPC_EXPERIMENTAL_ENABLE_NEW_PICK_FIRST"
-	// to "true".
-	NewPickFirstEnabled = boolFromEnv("GRPC_EXPERIMENTAL_ENABLE_NEW_PICK_FIRST", false)
+	// to "false".
+	NewPickFirstEnabled = boolFromEnv("GRPC_EXPERIMENTAL_ENABLE_NEW_PICK_FIRST", true)
 )
 
 func boolFromEnv(envVar string, def bool) bool {
diff --git a/internal/envconfig/xds.go b/internal/envconfig/xds.go
index 429f743c8328..2eb97f832b1c 100644
--- a/internal/envconfig/xds.go
+++ b/internal/envconfig/xds.go
@@ -56,7 +56,7 @@ var (
 
 	// XDSDualstackEndpointsEnabled is true if gRPC should read the
 	// "additional addresses" in the xDS endpoint resource.
-	XDSDualstackEndpointsEnabled = boolFromEnv("GRPC_EXPERIMENTAL_XDS_DUALSTACK_ENDPOINTS", false)
+	XDSDualstackEndpointsEnabled = boolFromEnv("GRPC_EXPERIMENTAL_XDS_DUALSTACK_ENDPOINTS", true)
 
 	// XDSSystemRootCertsEnabled is true when xDS enabled gRPC clients can use
 	// the system's default root certificates for TLS certificate validation.