diff --git a/.circleci/config.yml b/.circleci/config.yml
index 61ac8f7ed7..d1cb4b75b2 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -46,7 +46,7 @@ commands:
     steps:
       - save_cache:
           name: "Save rustup cache"
-          key: cargo-v2-{{ checksum "rust-toolchain" }}-{{ checksum "Cargo.toml" }}-{{ checksum "Cargo.lock" }}-{{arch}}
+          key: cargo-v2-{{ checksum "rust-toolchain" }}-{{ checksum "Cargo.toml" }}-{{ checksum "Cargo.lock" }}-{{ arch }}
           paths:
             - "~/.cargo"
             - "~/.rustup"
@@ -56,7 +56,6 @@ commands:
         - restore_cache:
             keys:
               - cargo-v2-{{ checksum "rust-toolchain" }}-{{ checksum "Cargo.toml" }}-{{ checksum "Cargo.lock" }}-{{ arch }}
-              - repo-source-{{ .Branch }}-{{ .Revision }}
 
   install_gpu_deps:
     steps:
@@ -79,9 +78,7 @@ jobs:
       - run:
           name: Calculate dependencies
           command: cargo generate-lockfile
-      - restore_cache:
-          keys:
-            - cargo-v2-{{ checksum "rust-toolchain" }}-{{ checksum "Cargo.toml" }}-{{ checksum "Cargo.lock" }}-{{ arch }}
+      - restore_rustup_cache
       - run: cargo update
       - run: cargo fetch
       - run: rm -rf .git
diff --git a/README.md b/README.md
index 60908a51d6..dc196c22ce 100644
--- a/README.md
+++ b/README.md
@@ -47,7 +47,11 @@ Lurk backend integration is still immature, so current performance is not repres
 ## Submodules
 
 Lurk source files used in tests are in the [lurk-lib](https://github.com/lurk-lang/lurk-lib) submodule. You must
-initialize and update submodules before test will pass.
+initialize and update submodules before test will pass:
+
+```
+git submodule update --init --recursive
+```
 
 ## Repl
 
diff --git a/src/proof/groth16.rs b/src/proof/groth16.rs
index 9f8f35c646..9d0030d564 100644
--- a/src/proof/groth16.rs
+++ b/src/proof/groth16.rs
@@ -104,17 +104,7 @@ impl Groth16Prover<Bls12> {
         params: &groth16::Parameters<Bls12>,
         mut rng: R,
     ) -> Result<groth16::Proof<Bls12>, SynthesisError> {
-        self.generate_groth16_proof(multi_frame, params, &mut rng)
-    }
-
-    fn generate_groth16_proof<R: RngCore>(
-        &self,
-        multiframe: MultiFrame<'_, Scalar, IO<Scalar>, Witness<Scalar>>,
-        groth_params: &groth16::Parameters<Bls12>,
-        rng: &mut R,
-    ) -> Result<groth16::Proof<Bls12>, SynthesisError> {
-        let create_proof = |p| groth16::create_random_proof(multiframe, p, rng);
-        create_proof(groth_params)
+        groth16::create_random_proof(multi_frame, params, &mut rng)
     }
 
     #[allow(clippy::too_many_arguments)]
@@ -146,9 +136,7 @@ impl Groth16Prover<Bls12> {
         let last_multiframe = multiframes.last().unwrap().clone();
         for multiframe in multiframes.into_iter() {
             statements.push(multiframe.public_inputs());
-            let proof = self
-                .generate_groth16_proof(multiframe.clone(), params, &mut rng)
-                .unwrap();
+            let proof = self.prove(multiframe.clone(), params, &mut rng).unwrap();
 
             proofs.push(proof.clone());
             multiframe_proofs.push((multiframe, proof));
@@ -162,7 +150,7 @@ impl Groth16Prover<Bls12> {
             );
 
             let dummy_proof = self
-                .generate_groth16_proof(dummy_multiframe.clone(), params, &mut rng)
+                .prove(dummy_multiframe.clone(), params, &mut rng)
                 .unwrap();
 
             let dummy_statement = dummy_multiframe.public_inputs();