diff --git a/faiss/perf_tests/bench_scalar_quantizer_accuracy.cpp b/faiss/perf_tests/bench_scalar_quantizer_accuracy.cpp
index 4b7ef48a53..b13b9114b8 100644
--- a/faiss/perf_tests/bench_scalar_quantizer_accuracy.cpp
+++ b/faiss/perf_tests/bench_scalar_quantizer_accuracy.cpp
@@ -6,7 +6,6 @@
  */
 
 #include <faiss/perf_tests/utils.h>
-#include <fmt/format.h>
 #include <gflags/gflags.h>
 #include <cstdio>
 #include <map>
@@ -76,7 +75,7 @@ int main(int argc, char** argv) {
 
     for (auto& [bench_name, quantizer_type] : benchs) {
         benchmark::RegisterBenchmark(
-                fmt::format("{}_{}d_{}n", bench_name, d, n).c_str(),
+                bench_name.c_str(),
                 bench_reconstruction_error,
                 quantizer_type,
                 d,
diff --git a/faiss/perf_tests/bench_scalar_quantizer_decode.cpp b/faiss/perf_tests/bench_scalar_quantizer_decode.cpp
index c2fdbf4294..fc9d520557 100644
--- a/faiss/perf_tests/bench_scalar_quantizer_decode.cpp
+++ b/faiss/perf_tests/bench_scalar_quantizer_decode.cpp
@@ -6,7 +6,6 @@
  */
 
 #include <faiss/perf_tests/utils.h>
-#include <fmt/format.h>
 #include <gflags/gflags.h>
 #include <omp.h>
 #include <cstdio>
@@ -63,11 +62,7 @@ int main(int argc, char** argv) {
 
     for (auto& [bench_name, quantizer_type] : benchs) {
         benchmark::RegisterBenchmark(
-                fmt::format("{}_{}d_{}n", bench_name, d, n).c_str(),
-                bench_decode,
-                quantizer_type,
-                d,
-                n)
+                bench_name.c_str(), bench_decode, quantizer_type, d, n)
                 ->Iterations(iterations);
     }
 
diff --git a/faiss/perf_tests/bench_scalar_quantizer_distance.cpp b/faiss/perf_tests/bench_scalar_quantizer_distance.cpp
index 81a92d7c7b..d0d1d9a474 100644
--- a/faiss/perf_tests/bench_scalar_quantizer_distance.cpp
+++ b/faiss/perf_tests/bench_scalar_quantizer_distance.cpp
@@ -5,7 +5,6 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-#include <fmt/format.h>
 #include <gflags/gflags.h>
 #include <omp.h>
 #include <cstdio>
@@ -72,11 +71,7 @@ int main(int argc, char** argv) {
 
     for (auto& [bench_name, quantizer_type] : benchs) {
         benchmark::RegisterBenchmark(
-                fmt::format("{}_{}d_{}n", bench_name, d, n).c_str(),
-                bench_distance,
-                quantizer_type,
-                d,
-                n)
+                bench_name.c_str(), bench_distance, quantizer_type, d, n)
                 ->Iterations(iterations);
     }
     benchmark::RunSpecifiedBenchmarks();
diff --git a/faiss/perf_tests/bench_scalar_quantizer_encode.cpp b/faiss/perf_tests/bench_scalar_quantizer_encode.cpp
index c35ecbd58c..40c95dabb4 100644
--- a/faiss/perf_tests/bench_scalar_quantizer_encode.cpp
+++ b/faiss/perf_tests/bench_scalar_quantizer_encode.cpp
@@ -5,7 +5,6 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-#include <fmt/format.h>
 #include <gflags/gflags.h>
 #include <omp.h>
 #include <cstdio>
@@ -57,11 +56,7 @@ int main(int argc, char** argv) {
 
     for (auto& [bench_name, quantizer_type] : benchs) {
         benchmark::RegisterBenchmark(
-                fmt::format("{}_{}d_{}n", bench_name, d, n).c_str(),
-                bench_encode,
-                quantizer_type,
-                d,
-                n)
+                bench_name.c_str(), bench_encode, quantizer_type, d, n)
                 ->Iterations(iterations);
     }