diff --git a/gunicorn/asgi/protocol.py b/gunicorn/asgi/protocol.py
index 8bdafc70..365ed59a 100644
--- a/gunicorn/asgi/protocol.py
+++ b/gunicorn/asgi/protocol.py
@@ -922,7 +922,13 @@ class ASGIProtocol(asyncio.Protocol):
                 # Skip for 1xx informational responses (RFC 9110)
                 # Skip if Transfer-Encoding already set by framework
                 is_informational = 100 <= response_status < 200
-                if not has_content_length and not has_transfer_encoding and request.version >= (1, 1) and not is_informational:
+                needs_chunked = (
+                    not has_content_length
+                    and not has_transfer_encoding
+                    and request.version >= (1, 1)
+                    and not is_informational
+                )
+                if needs_chunked:
                     use_chunked = True
                     response_headers = list(response_headers) + [(b"transfer-encoding", b"chunked")]
 
diff --git a/tests/docker/asgi_framework_compat/docker-compose.yml b/tests/docker/asgi_framework_compat/docker-compose.yml
index 92653f2b..cf70f530 100644
--- a/tests/docker/asgi_framework_compat/docker-compose.yml
+++ b/tests/docker/asgi_framework_compat/docker-compose.yml
@@ -17,8 +17,8 @@ x-healthcheck: &healthcheck
 services:
   django:
     build:
-      context: ./frameworks/django_app
-      dockerfile: Dockerfile
+      context: ../../..
+      dockerfile: tests/docker/asgi_framework_compat/frameworks/django_app/Dockerfile
     ports:
       - "8001:8000"
     command: ["gunicorn", "asgi:application", "-k", "asgi", "-b", "0.0.0.0:8000", "--workers", "1", "--worker-connections", "100", "--asgi-loop", "${ASGI_LOOP:-auto}"]
@@ -28,8 +28,8 @@ services:
 
   fastapi:
     build:
-      context: ./frameworks/fastapi_app
-      dockerfile: Dockerfile
+      context: ../../..
+      dockerfile: tests/docker/asgi_framework_compat/frameworks/fastapi_app/Dockerfile
     ports:
       - "8002:8000"
     command: ["gunicorn", "app:app", "-k", "asgi", "-b", "0.0.0.0:8000", "--workers", "1", "--worker-connections", "100", "--asgi-loop", "${ASGI_LOOP:-auto}"]
@@ -39,8 +39,8 @@ services:
 
   starlette:
     build:
-      context: ./frameworks/starlette_app
-      dockerfile: Dockerfile
+      context: ../../..
+      dockerfile: tests/docker/asgi_framework_compat/frameworks/starlette_app/Dockerfile
     ports:
       - "8003:8000"
     command: ["gunicorn", "app:app", "-k", "asgi", "-b", "0.0.0.0:8000", "--workers", "1", "--worker-connections", "100", "--asgi-loop", "${ASGI_LOOP:-auto}"]
@@ -50,8 +50,8 @@ services:
 
   quart:
     build:
-      context: ./frameworks/quart_app
-      dockerfile: Dockerfile
+      context: ../../..
+      dockerfile: tests/docker/asgi_framework_compat/frameworks/quart_app/Dockerfile
     ports:
       - "8004:8000"
     command: ["gunicorn", "app:app", "-k", "asgi", "-b", "0.0.0.0:8000", "--workers", "1", "--worker-connections", "100", "--asgi-loop", "${ASGI_LOOP:-auto}"]
@@ -61,8 +61,8 @@ services:
 
   litestar:
     build:
-      context: ./frameworks/litestar_app
-      dockerfile: Dockerfile
+      context: ../../..
+      dockerfile: tests/docker/asgi_framework_compat/frameworks/litestar_app/Dockerfile
     ports:
       - "8005:8000"
     command: ["gunicorn", "app:app", "-k", "asgi", "-b", "0.0.0.0:8000", "--workers", "1", "--worker-connections", "100", "--asgi-loop", "${ASGI_LOOP:-auto}"]
@@ -72,8 +72,8 @@ services:
 
   blacksheep:
     build:
-      context: ./frameworks/blacksheep_app
-      dockerfile: Dockerfile
+      context: ../../..
+      dockerfile: tests/docker/asgi_framework_compat/frameworks/blacksheep_app/Dockerfile
     ports:
       - "8006:8000"
     command: ["gunicorn", "app:app", "-k", "asgi", "-b", "0.0.0.0:8000", "--workers", "1", "--worker-connections", "100", "--asgi-loop", "${ASGI_LOOP:-auto}"]
diff --git a/tests/docker/asgi_framework_compat/frameworks/blacksheep_app/Dockerfile b/tests/docker/asgi_framework_compat/frameworks/blacksheep_app/Dockerfile
index a5e7a1f0..73265ba8 100644
--- a/tests/docker/asgi_framework_compat/frameworks/blacksheep_app/Dockerfile
+++ b/tests/docker/asgi_framework_compat/frameworks/blacksheep_app/Dockerfile
@@ -2,13 +2,20 @@ FROM python:3.12-slim
 
 WORKDIR /app
 
-# Install curl for healthcheck and git for pip install from git
-RUN apt-get update && apt-get install -y curl git && rm -rf /var/lib/apt/lists/*
+# Install curl for healthcheck
+RUN apt-get update && apt-get install -y curl && rm -rf /var/lib/apt/lists/*
 
-COPY requirements.txt .
+# Copy gunicorn source and install from local
+COPY gunicorn /gunicorn-src/gunicorn
+COPY pyproject.toml /gunicorn-src/
+COPY README.md /gunicorn-src/
+RUN pip install --no-cache-dir /gunicorn-src
+
+# Install other requirements
+COPY tests/docker/asgi_framework_compat/frameworks/blacksheep_app/requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
-COPY app.py .
+COPY tests/docker/asgi_framework_compat/frameworks/blacksheep_app/app.py .
 
 EXPOSE 8000
 
diff --git a/tests/docker/asgi_framework_compat/frameworks/blacksheep_app/requirements.txt b/tests/docker/asgi_framework_compat/frameworks/blacksheep_app/requirements.txt
index 5561732a..d974c849 100644
--- a/tests/docker/asgi_framework_compat/frameworks/blacksheep_app/requirements.txt
+++ b/tests/docker/asgi_framework_compat/frameworks/blacksheep_app/requirements.txt
@@ -1,4 +1,4 @@
-gunicorn @ git+https://github.com/benoitc/gunicorn.git@master
+# gunicorn is installed from local source in Dockerfile
 blacksheep>=2.0.0
 uvloop>=0.19.0
 websockets>=12.0
diff --git a/tests/docker/asgi_framework_compat/frameworks/django_app/Dockerfile b/tests/docker/asgi_framework_compat/frameworks/django_app/Dockerfile
index fd603b79..3c767b01 100644
--- a/tests/docker/asgi_framework_compat/frameworks/django_app/Dockerfile
+++ b/tests/docker/asgi_framework_compat/frameworks/django_app/Dockerfile
@@ -2,13 +2,25 @@ FROM python:3.12-slim
 
 WORKDIR /app
 
-# Install curl for healthcheck and git for pip install from git
-RUN apt-get update && apt-get install -y curl git && rm -rf /var/lib/apt/lists/*
+# Install curl for healthcheck
+RUN apt-get update && apt-get install -y curl && rm -rf /var/lib/apt/lists/*
 
-COPY requirements.txt .
+# Copy gunicorn source and install from local
+COPY gunicorn /gunicorn-src/gunicorn
+COPY pyproject.toml /gunicorn-src/
+COPY README.md /gunicorn-src/
+RUN pip install --no-cache-dir /gunicorn-src
+
+# Install other requirements
+COPY tests/docker/asgi_framework_compat/frameworks/django_app/requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
-COPY . .
+COPY tests/docker/asgi_framework_compat/frameworks/django_app/asgi.py .
+COPY tests/docker/asgi_framework_compat/frameworks/django_app/settings.py .
+COPY tests/docker/asgi_framework_compat/frameworks/django_app/urls.py .
+COPY tests/docker/asgi_framework_compat/frameworks/django_app/views.py .
+COPY tests/docker/asgi_framework_compat/frameworks/django_app/consumers.py .
+COPY tests/docker/asgi_framework_compat/frameworks/django_app/routing.py .
 
 ENV DJANGO_SETTINGS_MODULE=settings
 ENV PYTHONPATH=/app
diff --git a/tests/docker/asgi_framework_compat/frameworks/django_app/requirements.txt b/tests/docker/asgi_framework_compat/frameworks/django_app/requirements.txt
index 7c75f91b..226191c6 100644
--- a/tests/docker/asgi_framework_compat/frameworks/django_app/requirements.txt
+++ b/tests/docker/asgi_framework_compat/frameworks/django_app/requirements.txt
@@ -1,4 +1,4 @@
-gunicorn @ git+https://github.com/benoitc/gunicorn.git@master
+# gunicorn is installed from local source in Dockerfile
 Django>=5.0
 channels>=4.0.0
 uvloop>=0.19.0
diff --git a/tests/docker/asgi_framework_compat/frameworks/fastapi_app/Dockerfile b/tests/docker/asgi_framework_compat/frameworks/fastapi_app/Dockerfile
index a5e7a1f0..42b80cd2 100644
--- a/tests/docker/asgi_framework_compat/frameworks/fastapi_app/Dockerfile
+++ b/tests/docker/asgi_framework_compat/frameworks/fastapi_app/Dockerfile
@@ -2,13 +2,20 @@ FROM python:3.12-slim
 
 WORKDIR /app
 
-# Install curl for healthcheck and git for pip install from git
-RUN apt-get update && apt-get install -y curl git && rm -rf /var/lib/apt/lists/*
+# Install curl for healthcheck
+RUN apt-get update && apt-get install -y curl && rm -rf /var/lib/apt/lists/*
 
-COPY requirements.txt .
+# Copy gunicorn source and install from local
+COPY gunicorn /gunicorn-src/gunicorn
+COPY pyproject.toml /gunicorn-src/
+COPY README.md /gunicorn-src/
+RUN pip install --no-cache-dir /gunicorn-src
+
+# Install other requirements
+COPY tests/docker/asgi_framework_compat/frameworks/fastapi_app/requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
-COPY app.py .
+COPY tests/docker/asgi_framework_compat/frameworks/fastapi_app/app.py .
 
 EXPOSE 8000
 
diff --git a/tests/docker/asgi_framework_compat/frameworks/fastapi_app/requirements.txt b/tests/docker/asgi_framework_compat/frameworks/fastapi_app/requirements.txt
index 7f526a7f..c1bc195c 100644
--- a/tests/docker/asgi_framework_compat/frameworks/fastapi_app/requirements.txt
+++ b/tests/docker/asgi_framework_compat/frameworks/fastapi_app/requirements.txt
@@ -1,4 +1,4 @@
-gunicorn @ git+https://github.com/benoitc/gunicorn.git@master
+# gunicorn is installed from local source in Dockerfile
 fastapi>=0.110.0
 uvloop>=0.19.0
 websockets>=12.0
diff --git a/tests/docker/asgi_framework_compat/frameworks/litestar_app/Dockerfile b/tests/docker/asgi_framework_compat/frameworks/litestar_app/Dockerfile
index a5e7a1f0..2b512598 100644
--- a/tests/docker/asgi_framework_compat/frameworks/litestar_app/Dockerfile
+++ b/tests/docker/asgi_framework_compat/frameworks/litestar_app/Dockerfile
@@ -2,13 +2,20 @@ FROM python:3.12-slim
 
 WORKDIR /app
 
-# Install curl for healthcheck and git for pip install from git
-RUN apt-get update && apt-get install -y curl git && rm -rf /var/lib/apt/lists/*
+# Install curl for healthcheck
+RUN apt-get update && apt-get install -y curl && rm -rf /var/lib/apt/lists/*
 
-COPY requirements.txt .
+# Copy gunicorn source and install from local
+COPY gunicorn /gunicorn-src/gunicorn
+COPY pyproject.toml /gunicorn-src/
+COPY README.md /gunicorn-src/
+RUN pip install --no-cache-dir /gunicorn-src
+
+# Install other requirements
+COPY tests/docker/asgi_framework_compat/frameworks/litestar_app/requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
-COPY app.py .
+COPY tests/docker/asgi_framework_compat/frameworks/litestar_app/app.py .
 
 EXPOSE 8000
 
diff --git a/tests/docker/asgi_framework_compat/frameworks/litestar_app/requirements.txt b/tests/docker/asgi_framework_compat/frameworks/litestar_app/requirements.txt
index f07b970a..4c027cab 100644
--- a/tests/docker/asgi_framework_compat/frameworks/litestar_app/requirements.txt
+++ b/tests/docker/asgi_framework_compat/frameworks/litestar_app/requirements.txt
@@ -1,4 +1,4 @@
-gunicorn @ git+https://github.com/benoitc/gunicorn.git@master
+# gunicorn is installed from local source in Dockerfile
 litestar>=2.7.0
 uvloop>=0.19.0
 websockets>=12.0
diff --git a/tests/docker/asgi_framework_compat/frameworks/quart_app/Dockerfile b/tests/docker/asgi_framework_compat/frameworks/quart_app/Dockerfile
index a5e7a1f0..07d6dcf5 100644
--- a/tests/docker/asgi_framework_compat/frameworks/quart_app/Dockerfile
+++ b/tests/docker/asgi_framework_compat/frameworks/quart_app/Dockerfile
@@ -2,13 +2,20 @@ FROM python:3.12-slim
 
 WORKDIR /app
 
-# Install curl for healthcheck and git for pip install from git
-RUN apt-get update && apt-get install -y curl git && rm -rf /var/lib/apt/lists/*
+# Install curl for healthcheck
+RUN apt-get update && apt-get install -y curl && rm -rf /var/lib/apt/lists/*
 
-COPY requirements.txt .
+# Copy gunicorn source and install from local
+COPY gunicorn /gunicorn-src/gunicorn
+COPY pyproject.toml /gunicorn-src/
+COPY README.md /gunicorn-src/
+RUN pip install --no-cache-dir /gunicorn-src
+
+# Install other requirements
+COPY tests/docker/asgi_framework_compat/frameworks/quart_app/requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
-COPY app.py .
+COPY tests/docker/asgi_framework_compat/frameworks/quart_app/app.py .
 
 EXPOSE 8000
 
diff --git a/tests/docker/asgi_framework_compat/frameworks/quart_app/requirements.txt b/tests/docker/asgi_framework_compat/frameworks/quart_app/requirements.txt
index 1f50a34f..28385937 100644
--- a/tests/docker/asgi_framework_compat/frameworks/quart_app/requirements.txt
+++ b/tests/docker/asgi_framework_compat/frameworks/quart_app/requirements.txt
@@ -1,4 +1,4 @@
-gunicorn @ git+https://github.com/benoitc/gunicorn.git@master
+# gunicorn is installed from local source in Dockerfile
 quart>=0.19.0
 uvloop>=0.19.0
 websockets>=12.0
diff --git a/tests/docker/asgi_framework_compat/frameworks/starlette_app/Dockerfile b/tests/docker/asgi_framework_compat/frameworks/starlette_app/Dockerfile
index a5e7a1f0..16ce4d9f 100644
--- a/tests/docker/asgi_framework_compat/frameworks/starlette_app/Dockerfile
+++ b/tests/docker/asgi_framework_compat/frameworks/starlette_app/Dockerfile
@@ -2,13 +2,20 @@ FROM python:3.12-slim
 
 WORKDIR /app
 
-# Install curl for healthcheck and git for pip install from git
-RUN apt-get update && apt-get install -y curl git && rm -rf /var/lib/apt/lists/*
+# Install curl for healthcheck
+RUN apt-get update && apt-get install -y curl && rm -rf /var/lib/apt/lists/*
 
-COPY requirements.txt .
+# Copy gunicorn source and install from local
+COPY gunicorn /gunicorn-src/gunicorn
+COPY pyproject.toml /gunicorn-src/
+COPY README.md /gunicorn-src/
+RUN pip install --no-cache-dir /gunicorn-src
+
+# Install other requirements
+COPY tests/docker/asgi_framework_compat/frameworks/starlette_app/requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
-COPY app.py .
+COPY tests/docker/asgi_framework_compat/frameworks/starlette_app/app.py .
 
 EXPOSE 8000
 
diff --git a/tests/docker/asgi_framework_compat/frameworks/starlette_app/requirements.txt b/tests/docker/asgi_framework_compat/frameworks/starlette_app/requirements.txt
index 6bf1eecc..a4db846d 100644
--- a/tests/docker/asgi_framework_compat/frameworks/starlette_app/requirements.txt
+++ b/tests/docker/asgi_framework_compat/frameworks/starlette_app/requirements.txt
@@ -1,4 +1,4 @@
-gunicorn @ git+https://github.com/benoitc/gunicorn.git@master
+# gunicorn is installed from local source in Dockerfile
 starlette>=0.37.0
 uvloop>=0.19.0
 websockets>=12.0
diff --git a/tests/docker/asgi_framework_compat/results/compatibility_grid.json b/tests/docker/asgi_framework_compat/results/compatibility_grid.json
index 796c50c0..d90f3b26 100644
--- a/tests/docker/asgi_framework_compat/results/compatibility_grid.json
+++ b/tests/docker/asgi_framework_compat/results/compatibility_grid.json
@@ -1,5 +1,5 @@
 {
-  "generated": "2026-04-03T11:06:45.300191",
+  "generated": "2026-04-03T21:49:07.476946",
   "worker": "gunicorn.workers.gasgi.ASGIWorker",
   "frameworks": {
     "django": {
@@ -16,8 +16,8 @@
           "total": 19
         },
         "websocket": {
-          "passed": 13,
-          "failed": 6,
+          "passed": 19,
+          "failed": 0,
           "total": 19
         },
         "lifespan": {
@@ -31,7 +31,7 @@
           "total": 9
         }
       },
-      "total_passed": 66,
+      "total_passed": 72,
       "total_tests": 74
     },
     "fastapi": {
@@ -186,12 +186,12 @@
           "total": 8
         },
         "streaming": {
-          "passed": 1,
-          "failed": 8,
+          "passed": 9,
+          "failed": 0,
           "total": 9
         }
       },
-      "total_passed": 65,
+      "total_passed": 73,
       "total_tests": 74
     }
   }
diff --git a/tests/docker/asgi_framework_compat/results/compatibility_grid.md b/tests/docker/asgi_framework_compat/results/compatibility_grid.md
index 31bf8860..50c3778f 100644
--- a/tests/docker/asgi_framework_compat/results/compatibility_grid.md
+++ b/tests/docker/asgi_framework_compat/results/compatibility_grid.md
@@ -1,6 +1,6 @@
 # ASGI Framework Compatibility Grid
 
-**Generated:** 2026-04-03 11:06:45
+**Generated:** 2026-04-03 21:49:07
 **Worker:** gunicorn ASGI worker (`-k asgi`)
 **Event Loop:** auto (uvloop if available)
 
@@ -8,13 +8,13 @@
 
 | Framework | HTTP Scope | HTTP Messages | WebSocket | Lifespan | Streaming | Total |
 |-----------|---------|---------|---------|---------|---------|-------|
-| Django + Channels | 19/19 | **18/19** | **13/19** | **7/8** | 9/9 | **66/74** |
+| Django + Channels | 19/19 | **18/19** | 19/19 | **7/8** | 9/9 | **72/74** |
 | FastAPI | 19/19 | **18/19** | 19/19 | 8/8 | 9/9 | **73/74** |
 | Starlette | 19/19 | **18/19** | 19/19 | 8/8 | 9/9 | **73/74** |
 | Quart | **18/19** | **17/19** | **11/19** | 8/8 | 9/9 | **63/74** |
 | Litestar | **18/19** | **11/19** | **17/19** | 8/8 | 9/9 | **63/74** |
-| BlackSheep | 19/19 | **18/19** | 19/19 | 8/8 | **1/9** | **65/74** |
+| BlackSheep | 19/19 | **18/19** | 19/19 | 8/8 | 9/9 | **73/74** |
 
 *Bold indicates failures*
 
-**Overall:** 403/444 tests passed (90%)
+**Overall:** 417/444 tests passed (93%)