diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..eb6c5c6
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "hyper/hyper"]
+	path = hyper/hyper
+	url = git@github.com:hyperium/hyper.git
diff --git a/hyper/hyper b/hyper/hyper
new file mode 160000
index 0000000..75aac9f
--- /dev/null
+++ b/hyper/hyper
@@ -0,0 +1 @@
+Subproject commit 75aac9f47fe0246016e6133cd3cfa35b63c8904e
diff --git a/hyper/patches/min_local.patch b/hyper/patches/min_local.patch
new file mode 100644
index 0000000..ce99e2f
--- /dev/null
+++ b/hyper/patches/min_local.patch
@@ -0,0 +1,14 @@
+diff --git a/src/headers.rs b/src/headers.rs
+index 8407be18..ad29ad28 100644
+--- a/src/headers.rs
++++ b/src/headers.rs
+@@ -53,7 +53,7 @@ pub(super) fn content_length_parse_all_values(values: ValueIter<'_, HeaderValue>
+                         return None;
+                     }
+                 } else {
+-                    return None
++                    return Some(0_0);
+                 }
+             }
+         } else {
+            
\ No newline at end of file
diff --git a/test_crate.sh b/test_crate.sh
index 8a1cbed..a7f8edd 100755
--- a/test_crate.sh
+++ b/test_crate.sh
@@ -1,6 +1,27 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
 CRATE="${1:-hyper}"
 TOOLCHAIN="${TOOLCHAIN:-dev}"
 
 echo "Testing $CRATE +$TOOLCHAIN"
 
-cd "$CRATE" && cargo "+$TOOLCHAIN" build --features=full
\ No newline at end of file
+cd $CRATE
+
+function build() {
+    (cd "$CRATE" && RUSTFLAGS='-Zincremental-verify-ich' cargo "+$TOOLCHAIN" build --features=full)
+}
+
+build
+
+for patch in ./patches/* ; do
+    echo "Applying $patch..."
+    
+    (cd "$CRATE" && git apply "../$patch")
+    
+    build
+    
+    (cd "$CRATE" && git checkout HEAD .)
+    
+    build
+done
\ No newline at end of file