diff --git a/test.sh b/test.sh
index 074171bfe..762f20972 100755
--- a/test.sh
+++ b/test.sh
@@ -35,9 +35,16 @@ validate () {
   if [ "$VALIDATE" -eq "1" ]
   then
     echo "________Validate build________"
-    time cargo check $@ --frozen --no-default-features
-    time cargo check $@ --frozen --manifest-path util/io/Cargo.toml --no-default-features
-    time cargo check $@ --frozen --manifest-path util/io/Cargo.toml --features "mio"
+    time cargo check $@ --no-default-features
+    time cargo check $@ --manifest-path util/io/Cargo.toml --no-default-features
+    time cargo check $@ --manifest-path util/io/Cargo.toml --features "mio"
+
+    MODIFIED=$(git ls-files -m | grep Cargo.lock | wc -l)
+    if [ "$MODIFIED" -eq "1" ]
+    then
+      echo "Detected Cargo.lock modification. Exitting."
+      exit 1
+    fi
 
     # Validate chainspecs
     echo "________Validate chainspecs________"
@@ -71,7 +78,7 @@ cpp_test () {
 cargo_test () {
   echo "________Running Parity Full Test Suite________"
   git submodule update --init --recursive
-  time cargo test $OPTIONS --features "$FEATURES" --frozen --all $@ -- --test-threads $THREADS
+  time cargo test $OPTIONS --features "$FEATURES" --all $@ -- --test-threads $THREADS
 }