diff --git a/pkg/kv/kvserver/asim/assertion/assert.go b/pkg/kv/kvserver/asim/assertion/assert.go
index 71327e218cc0..6f5166e83257 100644
--- a/pkg/kv/kvserver/asim/assertion/assert.go
+++ b/pkg/kv/kvserver/asim/assertion/assert.go
@@ -405,8 +405,11 @@ func PrintSpanConfigConformanceList(tag string, ranges []roachpb.ConformanceRepo
 		if i == 0 {
 			buf.WriteString(fmt.Sprintf("%s:\n", tag))
 		}
-		buf.WriteString(fmt.Sprintf("  %s applying %s\n", printRangeDesc(r.RangeDescriptor),
+		buf.WriteString(fmt.Sprintf("  %s applying %s", printRangeDesc(r.RangeDescriptor),
 			spanconfigtestutils.PrintSpanConfigDiffedAgainstDefaults(r.Config)))
+		if i != len(ranges)-1 {
+			buf.WriteString("\n")
+		}
 	}
 	return buf.String()
 }
diff --git a/pkg/kv/kvserver/asim/tests/output.go b/pkg/kv/kvserver/asim/tests/output.go
index 84814bcdf81e..0e5aae7cd29a 100644
--- a/pkg/kv/kvserver/asim/tests/output.go
+++ b/pkg/kv/kvserver/asim/tests/output.go
@@ -169,7 +169,7 @@ func (tr testResultsReport) String() string {
 			buf.WriteString(output.eventExecutor.PrintEventsExecuted())
 		}
 		if failed {
-			buf.WriteString(fmt.Sprintf("sample%d: failed assertion\n%s", nthSample, output.reason))
+			buf.WriteString(fmt.Sprintf("sample%d: failed assertion\n%s\n", nthSample, output.reason))
 		} else {
 			buf.WriteString(fmt.Sprintf("sample%d: pass\n", nthSample))
 		}