diff --git a/scripts/run_tests_with_mocks.py b/scripts/run_tests_with_mocks.py
index 6d43c68400b..f7680bf8485 100755
--- a/scripts/run_tests_with_mocks.py
+++ b/scripts/run_tests_with_mocks.py
@@ -3,7 +3,7 @@
 # This script builds executable file using initial bitcode file and artifacts produced by KLEE.
 # To run the script provide all the arguments you want to pass to clang for building executable.
 #
-# NOTE: First argument is path to clang compiler
+# NOTE: First argument is path to compiler
 # NOTE: Pre-last argument should be a path to KLEE output directory which contains redefinitions.txt and externals.ll.
 # NOTE: Last argument is path to initial bitcode.
 #
@@ -22,6 +22,10 @@
 object_file = f'{filename}.o'
 sp.run(f'llc {bitcode} -filetype=obj -o {object_file}', shell=True)
 sp.run(f'llvm-objcopy {object_file} --redefine-syms {klee_out_dir}/redefinitions.txt', shell=True)
+
+externals = f'{klee_out_dir}/externals.o'
+sp.run(f'llc {klee_out_dir}/externals.ll -filetype=obj -o {externals}', shell=True)
+
 clang_args = ' '.join(sys.argv[1:len(sys.argv) - 2])
-print(f'{clang_args} {klee_out_dir}/externals.ll {object_file}')
-sp.run(f'{clang_args} {klee_out_dir}/externals.ll {object_file}', shell=True)
+print(f'{clang_args} {externals} {object_file}')
+sp.run(f'{clang_args} {externals} {object_file}', shell=True)
diff --git a/test/Replay/libkleeruntest/replay_mocks.c b/test/Replay/libkleeruntest/replay_mocks.c
index 6dec772a6ba..615bea931b6 100644
--- a/test/Replay/libkleeruntest/replay_mocks.c
+++ b/test/Replay/libkleeruntest/replay_mocks.c
@@ -3,16 +3,17 @@
 // RUN: %clang %s -emit-llvm -g %O0opt -c -o %t.bc
 // RUN: rm -rf %t.klee-out
 // RUN: %klee --output-dir=%t.klee-out --mock-policy=all %t.bc
-// RUN: %clang -c %t.bc -o %t.o
+
+// RUN: %llc %t.bc -filetype=obj -o %t.o
 // RUN: %llc %t.klee-out/externals.ll -filetype=obj -o %t_externals.o
 // RUN: %objcopy --redefine-syms %t.klee-out/redefinitions.txt %t.o
 // RUN: %cc -no-pie %t_externals.o %t.o %libkleeruntest -Wl,-rpath %libkleeruntestdir -o %t_runner
 // RUN: test -f %t.klee-out/test000001.ktest
 // RUN: env KTEST_FILE=%t.klee-out/test000001.ktest %t_runner
 
-// RUN: %runmocks %cc -no-pie %libkleeruntest -Wl,-rpath %libkleeruntestdir -o %t.klee-out/b.out %t.klee-out %t.bc
+// RUN: %runmocks %cc -no-pie %libkleeruntest -Wl,-rpath %libkleeruntestdir -o %t_runner2 %t.klee-out %t.bc
 // RUN: test -f %t.klee-out/test000001.ktest
-// RUN: env KTEST_FILE=%t.klee-out/test000001.ktest %t.klee-out/b.out
+// RUN: env KTEST_FILE=%t.klee-out/test000001.ktest %t_runner2
 
 extern int variable;