diff --git a/test/integration/extent.sh b/test/integration/extent.sh
index 39fb0a73..ee9f3ed4 100644
--- a/test/integration/extent.sh
+++ b/test/integration/extent.sh
@@ -1,5 +1,19 @@
 #!/bin/sh
 
+# With active profiling, xallocx may decline to grow non-page-aligned
+# allocations.  On platforms with real decommit/commit, this can make this
+# test observe a successful decommit without the matching commit.
+case ",${MALLOC_CONF_ALL}," in
+  *,prof:true,*)
+    case ",${MALLOC_CONF_ALL}," in
+      *,prof_active:false,*)
+        ;;
+      *)
+        return 1
+        ;;
+    esac
+esac
+
 if [ "x${enable_fill}" = "x1" ] ; then
   export MALLOC_CONF="junk:false"
 fi