diff --git a/src/test/ui/test-thread-capture.rs b/src/test/ui/test-thread-capture.rs
index 2f8f3163deb9..6bec48cd8167 100644
--- a/src/test/ui/test-thread-capture.rs
+++ b/src/test/ui/test-thread-capture.rs
@@ -3,6 +3,7 @@
 // run-flags: --test-threads=1
 // check-run-results
 // exec-env:RUST_BACKTRACE=0
+// ignore-emscripten no threads support
 
 #[test]
 fn thready_pass() {
diff --git a/src/test/ui/test-thread-capture.run.stdout b/src/test/ui/test-thread-capture.run.stdout
index 6a49de5f4ab9..1102aadab02a 100644
--- a/src/test/ui/test-thread-capture.run.stdout
+++ b/src/test/ui/test-thread-capture.run.stdout
@@ -10,7 +10,7 @@ fee
 fie
 foe
 fum
-thread 'main' panicked at 'explicit panic', $DIR/test-thread-capture.rs:29:5
+thread 'main' panicked at 'explicit panic', $DIR/test-thread-capture.rs:30:5
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 
 
diff --git a/src/test/ui/test-thread-nocapture.rs b/src/test/ui/test-thread-nocapture.rs
index c107c6c9dd32..82df6e77cb1d 100644
--- a/src/test/ui/test-thread-nocapture.rs
+++ b/src/test/ui/test-thread-nocapture.rs
@@ -3,6 +3,7 @@
 // run-flags: --test-threads=1 --nocapture
 // check-run-results
 // exec-env:RUST_BACKTRACE=0
+// ignore-emscripten no threads support
 
 #[test]
 fn thready_pass() {
diff --git a/src/test/ui/test-thread-nocapture.run.stderr b/src/test/ui/test-thread-nocapture.run.stderr
index ce5244c13ab2..98bd96d0abe8 100644
--- a/src/test/ui/test-thread-nocapture.run.stderr
+++ b/src/test/ui/test-thread-nocapture.run.stderr
@@ -1,2 +1,2 @@
-thread 'main' panicked at 'explicit panic', $DIR/test-thread-nocapture.rs:29:5
+thread 'main' panicked at 'explicit panic', $DIR/test-thread-nocapture.rs:30:5
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace