diff --git a/.github/workflows/gpu_fast_h100_tests.yml b/.github/workflows/gpu_fast_h100_tests.yml
index e1c0b8176..8a9e3ec84 100644
--- a/.github/workflows/gpu_fast_h100_tests.yml
+++ b/.github/workflows/gpu_fast_h100_tests.yml
@@ -147,8 +147,8 @@ jobs:
 
       - name: Run core crypto and internal CUDA backend tests
         run: |
-          BIG_TESTS_INSTANCE=FALSE make test_core_crypto_gpu
-          BIG_TESTS_INSTANCE=FALSE make test_integer_compression_gpu
+          BIG_TESTS_INSTANCE=TRUE make test_core_crypto_gpu
+          BIG_TESTS_INSTANCE=TRUE make test_integer_compression_gpu
           BIG_TESTS_INSTANCE=TRUE make test_cuda_backend
 
       - name: Run user docs tests
diff --git a/Makefile b/Makefile
index 34a64837d..ce2c09874 100644
--- a/Makefile
+++ b/Makefile
@@ -531,23 +531,23 @@ test_gpu: test_core_crypto_gpu test_integer_gpu test_cuda_backend
 .PHONY: test_core_crypto_gpu # Run the tests of the core_crypto module including experimental on the gpu backend
 test_core_crypto_gpu: install_rs_build_toolchain
 	RUSTFLAGS="$(RUSTFLAGS)" cargo $(CARGO_RS_BUILD_TOOLCHAIN) test --profile $(CARGO_PROFILE) \
-		--features=$(TARGET_ARCH_FEATURE),gpu -p $(TFHE_SPEC) -- core_crypto::gpu:: --test-threads=1
+		--features=$(TARGET_ARCH_FEATURE),gpu -p $(TFHE_SPEC) -- core_crypto::gpu::
 	RUSTFLAGS="$(RUSTFLAGS)" cargo $(CARGO_RS_BUILD_TOOLCHAIN) test --doc --profile $(CARGO_PROFILE) \
-		--features=$(TARGET_ARCH_FEATURE),gpu -p $(TFHE_SPEC) -- core_crypto::gpu:: --test-threads=1
+		--features=$(TARGET_ARCH_FEATURE),gpu -p $(TFHE_SPEC) -- core_crypto::gpu::
 
 .PHONY: test_integer_gpu # Run the tests of the integer module including experimental on the gpu backend
 test_integer_gpu: install_rs_build_toolchain
 	RUSTFLAGS="$(RUSTFLAGS)" cargo $(CARGO_RS_BUILD_TOOLCHAIN) test --profile $(CARGO_PROFILE) \
-		--features=$(TARGET_ARCH_FEATURE),integer,gpu -p $(TFHE_SPEC) -- integer::gpu::server_key:: --test-threads=1
+		--features=$(TARGET_ARCH_FEATURE),integer,gpu -p $(TFHE_SPEC) -- integer::gpu::server_key:: --test-threads=6
 	RUSTFLAGS="$(RUSTFLAGS)" cargo $(CARGO_RS_BUILD_TOOLCHAIN) test --doc --profile $(CARGO_PROFILE) \
 		--features=$(TARGET_ARCH_FEATURE),integer,gpu -p $(TFHE_SPEC) -- integer::gpu::server_key::
 
 .PHONY: test_integer_compression_gpu
 test_integer_compression_gpu: install_rs_build_toolchain
 	RUSTFLAGS="$(RUSTFLAGS)" cargo $(CARGO_RS_BUILD_TOOLCHAIN) test --profile $(CARGO_PROFILE) \
-		--features=$(TARGET_ARCH_FEATURE),integer,gpu -p $(TFHE_SPEC) -- integer::gpu::ciphertext::compressed_ciphertext_list::tests:: --test-threads=1
+		--features=$(TARGET_ARCH_FEATURE),integer,gpu -p $(TFHE_SPEC) -- integer::gpu::ciphertext::compressed_ciphertext_list::tests::
 	RUSTFLAGS="$(RUSTFLAGS)" cargo $(CARGO_RS_BUILD_TOOLCHAIN) test --doc --profile $(CARGO_PROFILE) \
-		--features=$(TARGET_ARCH_FEATURE),integer,gpu -p $(TFHE_SPEC) -- integer::gpu::ciphertext::compress --test-threads=1
+		--features=$(TARGET_ARCH_FEATURE),integer,gpu -p $(TFHE_SPEC) -- integer::gpu::ciphertext::compress
 
 .PHONY: test_integer_gpu_ci # Run the tests for integer ci on gpu backend
 test_integer_gpu_ci: install_rs_check_toolchain install_cargo_nextest
diff --git a/scripts/integer-tests.sh b/scripts/integer-tests.sh
index 9005f53e3..f7b58e219 100755
--- a/scripts/integer-tests.sh
+++ b/scripts/integer-tests.sh
@@ -130,11 +130,11 @@ fi
 # Override test-threads number to avoid Out-of-memory issues on GPU instances
 if [[ "${backend}" == "gpu" ]]; then
     if [[ "${BIG_TESTS_INSTANCE}" == TRUE ]]; then
-        test_threads=1
-        doctest_threads=1
+        test_threads=8
+        doctest_threads=8
     else
-        test_threads=1
-        doctest_threads=1
+        test_threads=3
+        doctest_threads=3
     fi
 fi