diff --git a/tests/unit/type/hash.tcl b/tests/unit/type/hash.tcl
index 931662989..56c0f2e9c 100644
--- a/tests/unit/type/hash.tcl
+++ b/tests/unit/type/hash.tcl
@@ -541,8 +541,11 @@ start_server {tags {"hash"}} {
         }
     }
 
-    test {HINCRBYFLOAT does not allow NaN or Infinity} {
-        assert_error "*value is NaN or Infinity*" {r hincrbyfloat hfoo field +inf}
-        assert_equal 0 [r exists hfoo]
+    # On some platforms strtold("+inf") with valgrind returns a non-inf result
+    if {!$::valgrind} {
+        test {HINCRBYFLOAT does not allow NaN or Infinity} {
+            assert_error "*value is NaN or Infinity*" {r hincrbyfloat hfoo field +inf}
+            assert_equal 0 [r exists hfoo]
+        }
     }
 }