diff --git a/src/test/ui/feature-gate-if_while_or_patterns.stderr b/src/test/ui/feature-gate-if_while_or_patterns.stderr
index c906fa5a2f4..d9ebdcee0e9 100644
--- a/src/test/ui/feature-gate-if_while_or_patterns.stderr
+++ b/src/test/ui/feature-gate-if_while_or_patterns.stderr
@@ -20,3 +20,4 @@ error[E0658]: multiple patterns in `if let` and `while let` are unstable (see is
 
 error: aborting due to 2 previous errors
 
+If you want more information on this error, try using "rustc --explain E0658"
diff --git a/src/test/ui/impl_trait_projections.stderr b/src/test/ui/impl_trait_projections.stderr
index 08de0eb99a3..a0a24cc9d04 100644
--- a/src/test/ui/impl_trait_projections.stderr
+++ b/src/test/ui/impl_trait_projections.stderr
@@ -32,3 +32,5 @@ error[E0223]: ambiguous associated type
 
 error: aborting due to 5 previous errors
 
+You've got a few errors: E0223, E0667
+If you want more information on an error, try using "rustc --explain E0223"
diff --git a/src/test/ui/issue-23302-1.stderr b/src/test/ui/issue-23302-1.stderr
index 0658c07fb1d..1248d2075a5 100644
--- a/src/test/ui/issue-23302-1.stderr
+++ b/src/test/ui/issue-23302-1.stderr
@@ -13,3 +13,4 @@ note: the cycle begins when const-evaluating `X::A::{{initializer}}`...
 
 error: aborting due to previous error
 
+If you want more information on this error, try using "rustc --explain E0391"
diff --git a/src/test/ui/issue-23302-2.stderr b/src/test/ui/issue-23302-2.stderr
index c4a1c4f80c8..5438ce4b797 100644
--- a/src/test/ui/issue-23302-2.stderr
+++ b/src/test/ui/issue-23302-2.stderr
@@ -13,3 +13,4 @@ note: the cycle begins when const-evaluating `Y::A::{{initializer}}`...
 
 error: aborting due to previous error
 
+If you want more information on this error, try using "rustc --explain E0391"
diff --git a/src/test/ui/issue-23302-3.stderr b/src/test/ui/issue-23302-3.stderr
index 76f543cff79..0a7e239d32f 100644
--- a/src/test/ui/issue-23302-3.stderr
+++ b/src/test/ui/issue-23302-3.stderr
@@ -18,3 +18,4 @@ note: ...which then requires processing `A`...
 
 error: aborting due to previous error
 
+If you want more information on this error, try using "rustc --explain E0391"
diff --git a/src/test/ui/issue-36163.stderr b/src/test/ui/issue-36163.stderr
index 3c32c2743a6..22e1f8c91ae 100644
--- a/src/test/ui/issue-36163.stderr
+++ b/src/test/ui/issue-36163.stderr
@@ -18,4 +18,4 @@ note: ...which then requires const-evaluating `A`...
 
 error: aborting due to previous error
 
-If you want more information on this error, try using "rustc --explain E0265"
+If you want more information on this error, try using "rustc --explain E0391"
diff --git a/src/test/ui/issue-45157.stderr b/src/test/ui/issue-45157.stderr
index e133aab31bc..9df58ac4b83 100644
--- a/src/test/ui/issue-45157.stderr
+++ b/src/test/ui/issue-45157.stderr
@@ -18,3 +18,4 @@ error[E0502]: cannot borrow `u.s.a` as mutable because it is also borrowed as im
 
 error: aborting due to 2 previous errors
 
+If you want more information on this error, try using "rustc --explain E0502"
diff --git a/src/test/ui/issue-47706.stderr b/src/test/ui/issue-47706.stderr
index adbc35c012b..f2afbb2052a 100644
--- a/src/test/ui/issue-47706.stderr
+++ b/src/test/ui/issue-47706.stderr
@@ -28,5 +28,4 @@ note: required by `foo`
 
 error: aborting due to 2 previous errors
 
-You've got a few errors: E0593, E0601
-If you want more information on an error, try using "rustc --explain E0593"
+If you want more information on this error, try using "rustc --explain E0593"
diff --git a/src/test/ui/nested_impl_trait.stderr b/src/test/ui/nested_impl_trait.stderr
index 094926120cd..6849a8e08e2 100644
--- a/src/test/ui/nested_impl_trait.stderr
+++ b/src/test/ui/nested_impl_trait.stderr
@@ -48,3 +48,5 @@ error[E0562]: `impl Trait` not allowed outside of function and inherent method r
 
 error: aborting due to 6 previous errors
 
+You've got a few errors: E0562, E0666
+If you want more information on an error, try using "rustc --explain E0562"