diff --git a/tests/r7rs-tests.scm b/tests/r7rs-tests.scm
index ca68e19f..0bece728 100644
--- a/tests/r7rs-tests.scm
+++ b/tests/r7rs-tests.scm
@@ -2367,15 +2367,15 @@
 
 ;; these all assume double precision, need to add alternatives for single
 (test-precision "-1.7976931348623157e+308")
-(test-precision "4.940656458412465e-324")
-(test-precision "9.881312916824931e-324")
-(test-precision "1.48219693752374e-323")
-(test-precision "1.976262583364986e-323")
-(test-precision "2.470328229206233e-323")
-(test-precision "2.420921664622108e-322")
-(test-precision "2.420921664622108e-320")
+(test-precision "4.940656458412465e-324" "5.0e-324")
+(test-precision "9.881312916824931e-324" "1.0e-323")
+(test-precision "1.48219693752374e-323" "1.5e-323")
+(test-precision "1.976262583364986e-323" "2.0e-323")
+(test-precision "2.470328229206233e-323" "2.5e-323")
+(test-precision "2.420921664622108e-322" "2.4e-322")
+(test-precision "2.420921664622108e-320" "2.421e-320")
 (test-precision "1.4489974452386991")
-(test-precision "0.14285714285714282")
+(test-precision "0.14285714285714282" "0.14285714285714288")
 (test-precision "1.7976931348623157e+308")
 
 (test-end)