diff --git a/test/libc/fmt/fmt_test.c b/test/libc/fmt/fmt_test.c
index b0052879d..e1670084a 100644
--- a/test/libc/fmt/fmt_test.c
+++ b/test/libc/fmt/fmt_test.c
@@ -70,12 +70,24 @@ TEST(fmt, g) {
   EXPECT_STREQ("+1", gc(xasprintf("%+g", 1.)));
   EXPECT_STREQ("-1", gc(xasprintf("%g", -1.)));
   EXPECT_STREQ("10", gc(xasprintf("%g", 10.)));
-  EXPECT_STREQ("10", gc(xasprintf("%.0g", 10.)));
   EXPECT_STREQ("-10", gc(xasprintf("%g", -10.)));
-  EXPECT_STREQ("-10", gc(xasprintf("%.0g", -10.)));
+  EXPECT_STREQ("1e+01", gc(xasprintf("%.0g", 10.)));
+  EXPECT_STREQ("-1e+01", gc(xasprintf("%.0g", -10.)));
+  EXPECT_STREQ("1", gc(xasprintf("%.0g", 1.0)));
+  EXPECT_STREQ("1e-05", gc(xasprintf("%.0g", 0.00001)));
+  EXPECT_STREQ("0.0001", gc(xasprintf("%.0g", 0.0001)));
+  EXPECT_STREQ("1e+01", gc(xasprintf("%.1g", 10.)));
+  EXPECT_STREQ("-1e+01", gc(xasprintf("%.1g", -10.)));
+  EXPECT_STREQ("1", gc(xasprintf("%.1g", 1.0)));
+  EXPECT_STREQ("1e-05", gc(xasprintf("%.1g", 0.00001)));
+  EXPECT_STREQ("0.0001", gc(xasprintf("%.1g", 0.0001)));
+  EXPECT_STREQ("0.007812", gc(xasprintf("%.4g", 0.0078125)));
+  EXPECT_STREQ("0.023438", gc(xasprintf("%.5g", 0.0234375)));
   EXPECT_STREQ("1e+100", gc(xasprintf("%g", 1e100)));
   EXPECT_STREQ("1e-100", gc(xasprintf("%g", 1e-100)));
   EXPECT_STREQ("-1e-100", gc(xasprintf("%g", -1e-100)));
+  EXPECT_STREQ("0.123456", gc(xasprintf("%g", 0.1234564)));
+  EXPECT_STREQ("0.123457", gc(xasprintf("%g", 0.1234566)));
   EXPECT_STREQ("3.14159", gc(xasprintf("%g", 0x1.921fb54442d1846ap+1)));
   EXPECT_STREQ("0", gc(xasprintf("%g", 0.)));
   EXPECT_STREQ("-0", gc(xasprintf("%g", -0.)));