diff --git a/src/librustdoc/json/conversions.rs b/src/librustdoc/json/conversions.rs
index 556a922f7044c..d23e9a8ca456a 100644
--- a/src/librustdoc/json/conversions.rs
+++ b/src/librustdoc/json/conversions.rs
@@ -17,7 +17,7 @@ use rustc_hir_pretty::PpAnn;
 use rustc_metadata::rendered_const;
 use rustc_middle::ty::{self, TyCtxt};
 use rustc_span::def_id::ModId;
-use rustc_span::{Pos, Symbol, bug, kw, sym};
+use rustc_span::{Pos, RemapPathScopeComponents, Symbol, bug, kw, sym};
 use rustdoc_json_types::*;
 
 use crate::clean::{self, ItemId};
@@ -191,17 +191,14 @@ impl FromClean<clean::Span> for Option<Span> {
     fn from_clean(span: &clean::Span, renderer: &JsonRenderer<'_>) -> Self {
         match span.filename(renderer.sess()) {
             rustc_span::FileName::Real(name) => {
-                if let Some(local_path) = name.into_local_path() {
-                    let hi = span.hi(renderer.sess());
-                    let lo = span.lo(renderer.sess());
-                    Some(Span {
-                        filename: local_path,
-                        begin: (lo.line, lo.col.to_usize() + 1),
-                        end: (hi.line, hi.col.to_usize() + 1),
-                    })
-                } else {
-                    None
-                }
+                let filename = name.path(RemapPathScopeComponents::DOCUMENTATION);
+                let hi = span.hi(renderer.sess());
+                let lo = span.lo(renderer.sess());
+                Some(Span {
+                    filename: filename.to_path_buf(),
+                    begin: (lo.line, lo.col.to_usize() + 1),
+                    end: (hi.line, hi.col.to_usize() + 1),
+                })
             }
             _ => None,
         }
diff --git a/tests/rustdoc-json/README.md b/tests/rustdoc-json/README.md
new file mode 100644
index 0000000000000..875a149585010
--- /dev/null
+++ b/tests/rustdoc-json/README.md
@@ -0,0 +1,7 @@
+## `tests/rustdoc-json/remap-path-prefix`
+
+Tests for `--remap-path-prefix` and `--remap-path-scope` with rustdoc JSON:
+ - `remap-path-prefix`: only uses bare `--remap-path-prefix`, expects remapped paths
+ - `doc`: pass `--remap-path-prefix` and the `documentation` scope, expects remapped paths
+ - `object`: pass `--remap-path-prefix` and the `object` scope, expects un-remapped paths
+ - `debuginfo`: pass `--remap-path-prefix` and the `debuginfo` scope, expects un-remapped paths
diff --git a/tests/rustdoc-json/remap-path-prefix/debuginfo.rs b/tests/rustdoc-json/remap-path-prefix/debuginfo.rs
new file mode 100644
index 0000000000000..d378dca22be58
--- /dev/null
+++ b/tests/rustdoc-json/remap-path-prefix/debuginfo.rs
@@ -0,0 +1,5 @@
+//@ compile-flags: --remap-path-prefix={{src-base}}=/remapped
+//@ compile-flags: --remap-path-scope=debuginfo -Zunstable-options
+
+//@ is "$.index[?(@.name=='StrLike')].span.filename" $FILE
+pub trait StrLike {}
diff --git a/tests/rustdoc-json/remap-path-prefix/diag.rs b/tests/rustdoc-json/remap-path-prefix/diag.rs
new file mode 100644
index 0000000000000..79b469c40084e
--- /dev/null
+++ b/tests/rustdoc-json/remap-path-prefix/diag.rs
@@ -0,0 +1,5 @@
+//@ compile-flags: --remap-path-prefix={{src-base}}=/remapped
+//@ compile-flags: --remap-path-scope=diagnostics -Zunstable-options
+
+//@ is "$.index[?(@.name=='StrLike')].span.filename" $FILE
+pub trait StrLike {}
diff --git a/tests/rustdoc-json/remap-path-prefix/doc.rs b/tests/rustdoc-json/remap-path-prefix/doc.rs
new file mode 100644
index 0000000000000..aa3d13255753e
--- /dev/null
+++ b/tests/rustdoc-json/remap-path-prefix/doc.rs
@@ -0,0 +1,6 @@
+//@ ignore-windows
+//@ compile-flags: --remap-path-prefix={{src-base}}=/remapped
+//@ compile-flags: --remap-path-scope=documentation -Zunstable-options
+
+//@ is "$.index[?(@.name=='StrLike')].span.filename" \"/remapped/remap-path-prefix/doc.rs\"
+pub trait StrLike {}
diff --git a/tests/rustdoc-json/remap-path-prefix/object.rs b/tests/rustdoc-json/remap-path-prefix/object.rs
new file mode 100644
index 0000000000000..052ad7651eeab
--- /dev/null
+++ b/tests/rustdoc-json/remap-path-prefix/object.rs
@@ -0,0 +1,5 @@
+//@ compile-flags: --remap-path-prefix={{src-base}}=/remapped
+//@ compile-flags: --remap-path-scope=object -Zunstable-options
+
+//@ is "$.index[?(@.name=='StrLike')].span.filename" $FILE
+pub trait StrLike {}
diff --git a/tests/rustdoc-json/remap-path-prefix/remap-path-prefix.rs b/tests/rustdoc-json/remap-path-prefix/remap-path-prefix.rs
new file mode 100644
index 0000000000000..b3c2001ac5fb2
--- /dev/null
+++ b/tests/rustdoc-json/remap-path-prefix/remap-path-prefix.rs
@@ -0,0 +1,5 @@
+//@ ignore-windows
+//@ compile-flags: --remap-path-prefix={{src-base}}=/remapped
+
+//@ is "$.index[?(@.name=='StrLike')].span.filename" \"/remapped/remap-path-prefix/remap-path-prefix.rs\"
+pub trait StrLike {}