diff --git a/tests/Android.bp b/tests/Android.bp
index da56367..25af05e 100644
--- a/tests/Android.bp
+++ b/tests/Android.bp
@@ -328,12 +328,6 @@
             ],
         }
     },
-
-    product_variables: {
-        debuggable: {
-            cppflags: ["-DUSE_LD_CONFIG_FILE"],
-        },
-    },
 }
 
 // -----------------------------------------------------------------------------
@@ -624,12 +618,6 @@
     sanitize: {
         never: false,
     },
-
-    product_variables: {
-        debuggable: {
-            cppflags: ["-DUSE_LD_CONFIG_FILE"],
-        },
-    },
 }
 
 subdirs = ["libs"]
diff --git a/tests/dl_test.cpp b/tests/dl_test.cpp
index ceb0b4d..2133a2c 100644
--- a/tests/dl_test.cpp
+++ b/tests/dl_test.cpp
@@ -180,12 +180,24 @@
 }
 #endif
 
-#ifdef USE_LD_CONFIG_FILE
+#if defined(__BIONIC__)
+static bool is_user_build() {
+  std::string build_type = android::base::GetProperty("ro.build.type", "user");
+  if (build_type == "userdebug" || build_type == "eng") {
+    return false;
+  }
+  return true;
+}
+#endif
 
 // _lib1.so and _lib2.so are now searchable by having another namespace 'ns2'
 // whose search paths include the 'ns2/' subdir.
 TEST(dl, exec_with_ld_config_file) {
 #if defined(__BIONIC__)
+  if (is_user_build()) {
+    // LD_CONFIG_FILE is not supported on user build
+    return;
+  }
   std::string helper = get_testlib_root() +
       "/ld_config_test_helper/ld_config_test_helper";
   std::string config_file = get_testlib_root() + "/ld.config.txt";
@@ -204,6 +216,10 @@
 // additional namespaces other than the default namespace.
 TEST(dl, exec_with_ld_config_file_with_ld_preload) {
 #if defined(__BIONIC__)
+  if (is_user_build()) {
+    // LD_CONFIG_FILE is not supported on user build
+    return;
+  }
   std::string helper = get_testlib_root() +
       "/ld_config_test_helper/ld_config_test_helper";
   std::string config_file = get_testlib_root() + "/ld.config.txt";
@@ -218,8 +234,6 @@
 #endif
 }
 
-#endif // USE_LD_CONFIG_FILE
-
 // ensures that LD_CONFIG_FILE env var does not work for production builds.
 // The test input is the same as exec_with_ld_config_file, but it must fail in
 // this case.
@@ -230,8 +244,7 @@
     // This test is only for CTS.
     return;
   }
-  std::string build_type = android::base::GetProperty("ro.build.type", "user");
-  if (build_type == "userdebug" || build_type == "eng") {
+  if (!is_user_build()) {
     // Skip the test for non production devices
     return;
   }
diff --git a/tests/pthread_test.cpp b/tests/pthread_test.cpp
index 46140bb..f342577 100755
--- a/tests/pthread_test.cpp
+++ b/tests/pthread_test.cpp
@@ -2117,8 +2117,9 @@
 
   const auto kPageSize = sysconf(_SC_PAGE_SIZE);
 
-  // Use up all the VMAs. By default this is 64Ki.
+  // Use up all the VMAs. By default this is 64Ki (though some will already be in use).
   std::vector<void*> pages;
+  pages.reserve(64 * 1024);
   int prot = PROT_NONE;
   while (true) {
     void* page = mmap(nullptr, kPageSize, prot, MAP_ANON|MAP_PRIVATE, -1, 0);