diff --git a/contrib/test.sh b/contrib/test.sh
index 5a32f56..60abe44 100755
--- a/contrib/test.sh
+++ b/contrib/test.sh
@@ -8,6 +8,11 @@ rustc --version
 # Make all cargo invocations verbose
 export CARGO_TERM_VERBOSE=true
 
+# Pin dependencies as required if we are using MSRV toolchain.
+if cargo --version | grep "1\.56"; then
+    cargo update -p cc --precise 1.0.94
+fi
+
 # Defaults / sanity checks
 cargo build --all
 cargo test --all