diff --git a/libc/test/src/stdlib/StrtolTest.h b/libc/test/src/stdlib/StrtolTest.h
--- a/libc/test/src/stdlib/StrtolTest.h
+++ b/libc/test/src/stdlib/StrtolTest.h
@@ -8,6 +8,7 @@
 
 #include "src/__support/CPP/limits.h"
 #include "src/__support/CPP/type_traits.h"
+#include "src/__support/macros/properties/architectures.h"
 #include "src/errno/libc_errno.h"
 #include "test/UnitTest/Test.h"
 
@@ -197,6 +198,8 @@
     EXPECT_EQ(str_end - just_space_and_sign, ptrdiff_t(0));
   }
 
+  // This test is excessively slow on the GPU so we disable it there.
+#if !defined(LIBC_TARGET_ARCH_IS_GPU)
   void DecodeInOtherBases(FunctionT func) {
     char small_string[4] = {'\0', '\0', '\0', '\0'};
     for (int base = 2; base <= 36; ++base) {
@@ -292,6 +295,7 @@
       }
     }
   }
+#endif
 
   void CleanBaseSixteenDecode(FunctionT func) {
     char *str_end = nullptr;