diff --git a/barretenberg/acir_tests/Dockerfile.bb b/barretenberg/acir_tests/Dockerfile.bb
index ce0d274c2ec..3afa93c0ed9 100644
--- a/barretenberg/acir_tests/Dockerfile.bb
+++ b/barretenberg/acir_tests/Dockerfile.bb
@@ -6,6 +6,6 @@ COPY --from=0 /usr/src/barretenberg/cpp/build /usr/src/barretenberg/cpp/build
 WORKDIR /usr/src/barretenberg/acir_tests
 COPY . .
 # Run every acir test through native bb build "prove_and_verify".
-RUN ./run_acir_tests.sh
+RUN FLOW=all_cmds ./run_acir_tests.sh
 # Run 1_mul through native bb build, all_cmds flow, to test all cli args.
 RUN VERBOSE=1 FLOW=all_cmds ./run_acir_tests.sh 1_mul
diff --git a/barretenberg/cpp/src/barretenberg/bb/main.cpp b/barretenberg/cpp/src/barretenberg/bb/main.cpp
index 61c15c7f372..c996c90063e 100644
--- a/barretenberg/cpp/src/barretenberg/bb/main.cpp
+++ b/barretenberg/cpp/src/barretenberg/bb/main.cpp
@@ -116,6 +116,7 @@ void prove(const std::string& bytecodePath,
     auto constraint_system = get_constraint_system(bytecodePath);
     auto witness = get_witness(witnessPath);
     auto acir_composer = init(constraint_system);
+    acir_composer.init_proving_key(constraint_system);
     auto proof = acir_composer.create_proof(constraint_system, witness, recursive);
 
     if (outputPath == "-") {